Shetland wiring fix (#3237)

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## About The Pull Request

Fixes a minor wiring issue on the Shetland, where the input and output
power lines are shorted together.

Before:

![shetlandShort_circled](https://github.com/user-attachments/assets/6769c666-7a6f-4b9e-b4cf-866229a992cd)

![roundstartShetlandPowerMonitor_NoFix](https://github.com/user-attachments/assets/55ef1250-f05c-47bf-b198-97b8c803bf17)

After:

![shetlandShort_fixed](https://github.com/user-attachments/assets/f9e9280c-92db-4451-b3cd-e8556c107aad)

![roundstartShetlandPowerMonitor_Fixed](https://github.com/user-attachments/assets/a1ee706a-8fa3-4984-a5d7-5fa7549d855a)

## Why It's Good For The Game

<!-- Please add a short description of why you think these changes would
benefit the game. If you can't justify it in words, it might not be
worth adding. -->

This short bypasses the SMES units aboard and more or less renders them
useless. This change should fix this, and allow them to work as they're
supposed to.

## Changelog

:cl:
fix: fixed a short on the Shetland
/:cl:

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_maps/shuttles/independent/independent_shetland.dmm

@@ -377,6 +377,9 @@
 	},
 /obj/machinery/atmospherics/pipe/simple/cyan/visible/layer5,
 /obj/item/radio/intercom/directional/east,
+/obj/structure/cable/yellow{
+	icon_state = "2-8"
+	},
 /turf/open/floor/plasteel/dark,
 /area/ship/engineering/engine)
 "dl" = (
@@ -930,9 +933,6 @@
 /obj/machinery/atmospherics/pipe/simple/cyan/visible/layer5{
 	dir = 5
 	},
-/obj/structure/cable/yellow{
-	icon_state = "4-10"
-	},
 /obj/machinery/atmospherics/pipe/simple/supply/hidden/layer2{
 	dir = 4
 	},
@@ -945,6 +945,12 @@
 /obj/machinery/atmospherics/pipe/simple/dark/visible{
 	dir = 10
 	},
+/obj/structure/cable/yellow{
+	icon_state = "1-4"
+	},
+/obj/structure/cable/yellow{
+	icon_state = "4-8"
+	},
 /turf/open/floor/plasteel/dark,
 /area/ship/engineering/engine)
 "ib" = (
@@ -1336,6 +1342,9 @@
 /obj/machinery/atmospherics/pipe/simple/scrubbers/hidden/layer4{
 	dir = 9
 	},
+/obj/structure/cable/yellow{
+	icon_state = "1-2"
+	},
 /turf/open/floor/plating,
 /area/ship/engineering/engine)
 "lu" = (
@@ -2144,6 +2153,9 @@
 /obj/structure/cable{
 	icon_state = "1-6"
 	},
+/obj/structure/cable/yellow{
+	icon_state = "4-8"
+	},
 /turf/open/floor/plasteel/dark,
 /area/ship/engineering/engine)
 "sb" = (
@@ -2686,9 +2698,6 @@
 /turf/open/floor/plasteel/dark,
 /area/ship/engineering/engine)
 "wW" = (
-/obj/structure/cable/yellow{
-	icon_state = "1-6"
-	},
 /obj/machinery/atmospherics/pipe/simple/supply/hidden/layer2{
 	dir = 6
 	},
@@ -2698,6 +2707,12 @@
 /obj/machinery/atmospherics/pipe/simple/dark/visible{
 	dir = 4
 	},
+/obj/structure/cable/yellow{
+	icon_state = "1-5"
+	},
+/obj/structure/cable/yellow{
+	icon_state = "2-4"
+	},
 /turf/open/floor/plating,
 /area/ship/engineering/engine)
 "xd" = (
@@ -3115,12 +3130,6 @@
 /obj/effect/turf_decal/number/zero{
 	dir = 8
 	},
-/obj/structure/cable/yellow{
-	icon_state = "5-9"
-	},
-/obj/structure/cable/yellow{
-	icon_state = "5-10"
-	},
 /obj/machinery/atmospherics/pipe/layer_manifold/visible{
 	dir = 4
 	},
@@ -5524,12 +5533,12 @@
 /turf/open/floor/plasteel,
 /area/ship/hallway/fore)
 "VV" = (
-/obj/structure/cable/yellow{
-	icon_state = "2-5"
-	},
 /obj/machinery/atmospherics/components/unary/vent_pump/on/layer2{
 	dir = 1
 	},
+/obj/structure/cable/yellow{
+	icon_state = "1-2"
+	},
 /turf/open/floor/plasteel/dark,
 /area/ship/engineering/engine)
 "VZ" = (
@@ -5766,6 +5775,9 @@
 /obj/structure/cable{
 	icon_state = "1-2"
 	},
+/obj/structure/cable/yellow{
+	icon_state = "4-10"
+	},
 /turf/open/floor/plasteel/dark,
 /area/ship/engineering/engine)
 "XY" = (