Voodoo Lab

Im sorry... but I looked at the GCX manual and im still not clear. Could someone please draw me an easy to understand drawing of how to hook up my Marshall JMP-1 preamp and ADA MP-1 preamp to the GCX so I can switch between them with my Ground Control Pro. I do not want to combine. Only switch back ...

Could someone please draw out an easy to understand diagram for me. I want to connect 3 different preamps to my GCX and switch between them by stepping on button 1 for the first preamp button 2 for the second preamp and button 3 for the third preamp. I don't want to combine them. Only switch between...