Included is the STEP file to modify the model how you want for your preferred light method.

Backplate is in the Raw Files section.

The holes in the back are for USBC port and an on off switch linked here:

USBC: https://a.aliexpress.com/_mPzo30o

On/OFF Switch: https://a.aliexpress.com/_msxT1XO

LED's: https://a.aliexpress.com/_m0f9INq