3D render of the LED PCB, from an isometric view, front bottom corner, showing how the LED and MCU PCBs would stack up. The gold pads on the MCU PCB can be seen peeking out of semi-circular half holes on the edge of the LED PCB.
https://cdn.masto.host/ledssocial/media_attachments/files/112/072/752/497/870/751/original/71b7ca0c9ec9883e.png