Hello all. I need some help with my new airplane radio receiver. I have an old airplane, and the wirering for the radio goes as folows: 1 radio receiver, has 5 slots in it, 1 for the plug from the swith, which connects to the battery on the other end, and 4 for the different channels. On my new airplane which I just finished building, I bought a couple of different radio units, but both of them have 4 slots, one for each of the channels. My question is, with these type of radio raceivers, where and how do I connect the switch/battery part? If more information is needed, let me know and I will add it up, and not, please find the time to reply my post, as I am near compleation of the airplane, and would love to take it out on a test flight ASAP. Thanks. Yuval Lahav. Rome, Italy.