Hi , need help regarding the Engel RMR and the 4 way switch to operate the bow planes on Gato. I have down loaded the wiring diagrams but am confused as to the connection between RMR and switch, only - wire. Also do i need to connect both RMR and switch to receiver, i am running out of channels. 1 channel rudder ,2 channels props 1 channel aft dive planes and 3 channels for ballast tanks, leaves me 1 for RMR and switch. Any info will be greatly appreciated