Ideas to fix ESP32-Trinity to rear of RGB matrix panel?

[Jimbo99]

I'm using an ESP32-Trinity board with a 64x32 2.5mm pitch RGB LED matrix panel. It works brilliantly.

Just wondering if anyone has suggestions how to physically mount the ESP32-Trinity so that it does not fall out when plugged into the rear of the matrix panel? (The screw thread holes in my panel do not match any of the holes in the ESP32-Trinity board). Thanks.