Hey guys I went out and got a hump pack , I disconnected wire from old 4 cell battery holder and figured I connect new hump pack to the wire that I disconnected 4 cell from the wire that goes into the off side of the power switch but of course new hump pack wire and that one don't fit together...so I connected hump pack wire into servo where the wire from the side of the on switch use to go still wont work what gives ?