At the bottom of the TBS SourceX frame there is a square hold below the FPV Camera. This is a great spot to put a camera control for the FPV Camera. It fits in nice and tight and the control unit goes in on top. Then screw in the top pad part. The pad allows the buttons to be pushed but keeps the unit water resistant from Rain. etc. to make a better seal just put sold glue at the front and sides between the two parts. Fits the Foxeer Camera 5 button perfectly, but will also fit other models. Print with TPU so that you can use the buttons.