Don't know where to run those USB cables for your aftermarket head unit? This panel slides into the unused OBD connector slot behind the lower radio cage trim.
There's enough room with the trim installed to hide a small flash drive. You can also snake a charging cable behind the trim for a semi-permanent phone charger installation.
Simply apply high temperature hot glue to the outside of the USB extension cables and slide them into the panel.
The outer dimensions for the USB A connector should be max 18.5mm x 11mm.
The outer dimensions for the USB C connector should be max 12.75xmm x 7mm.
The USB C connector is an extension which leads to a fast charger and wired into the radio harness:
https://www.amazon.com/dp/B074K318JK
The author hasn't provided the model origin yet.