setup of syma x5c camera to work on channel 3
 

Ok, so I bought this syma x5c-1 quad copter to fly around with while I'm learning to fly. This thing has a 2 megapixel camera on it. The way it works is the trim button for the throttle is what triggers it to take videos or pictures. If I press up on the throttle trim it snaps a pucture, if I press down it records video. So, the question...how do I make channel 3 on my dx3s radio trigger it to take pictures and record video. I want to mount this little thing on my 22t stadium truck and record fpv of my races to watch later on. Any help on this would be awesome!!!

syma camera channel 3
 

This syma camera had 3 wires. I've figured out that if you tap the yellow wire to the ground with it will snap a picture. If you tap for a couple seconds it will take video. So how do I rig this thing up to work on my dx3s radio? I want to be able to push the button on the radio and have it to one or the other based on how long I hold the button.