Helix send 1 to Top1 jack; Bottom1 jack to FM3 input. That will have send 1 of Helix going to FM3 input if I don't connect anything to either Top1 or Bottom1 on the "user" side of the patchbay. If I want to run some pedals in front of the FM3, I can patchbthem in between Top1 and Bottom1. If I want to plug directly into FM3 and just use the Helix as a "normal" audio interface for capturing analog outputs of the FM3, I can plug my guitar straight into Bottom1 and bypass the Helix input altogether.
FM3 stereo out goes back to Helix return 1 and 2.
Helix Send 3 goes to top 2. Helix send 4 goes to top 3. Helix return 3 goes to Bottom 2. Helix return 4 goes to Bottom 3. I can patch pedals into these as wanted - either as a single stereo chain/loop, or as separate mono chains/loops.
I need to check how the aux input and front panel input work on the rack. Assuming they both use the impedance circuitry and the front panel input acts as an over-ride, I THINK I will have my G10 wireless going into aux in on back of rack, and Bottom4 of patchbay wired to front jack. If I need variable input impedance just plug a cable into Bottom 4 of patch bay, or if I wanna run pedals in front of Helix, plug guitar into first pedal and pedal output into Bottom4..
I think I should probably get to a point where the pedals are in a pretty steady configuration amongst themselves and all I have to do is disconnect/connect things at the patchbay, and maybe connect/disconnect cable at front panel input of Helix.
I'm really sick of guitar cables on floor and want to get back to using the G10 unless I really NEED a cable (20% of time, max).