This camera tray has five 1/4-20 threaded holes for mounting lights, camera accessories, or action cameras. It also pairs great with our Star Base Mount for 1/4-20 screws to attach to your DPV. This gives you access to be able to mount a front and rear facing action camera and also have lights for the forward facing camera all in one mount.
This link is to the screw that we have found works best for mounting your action camera mount that use a 1/4-20 screw or any other mounts you would use that the 1/4-20 screw and comes in from the bottom side.