Old Guy Needs Help with 8 Channel Helix DSP/AMP Jumpers

I'm 65 and love great audio inside and outside. I have a 911 and had that professionally installed with new Helix AMP/DSP Mk2 and Focal Speakers. I just bought a USED 2022 Honda Pilot Touring model with upgraded OEM Stereo 8 channel 365 watts - ya right - which is supposedly better that lower builds of this years Pilots.

Anyway, I 've updated all 8 speakers with NEW Focal Speakers and Subwoofer. It's amazing how much better it already sounds. The Touring addition of the Pilot has a 365 watt amp, if I remember right, and 8 speakers/SUB. I bought an OEM eBay amp (Panasonic builds for Honda) with pigtails and internal connection to build my own T connector.

The plan is to take the output of OEM Head-unit (HU) amp and use that as input to Helix 8 Channel DSP/AMPs Mk2 High-level Input. Hook up the speakers via the other side of the T connector from output of Helix. I've been reading the manual and don't want to fork this up.

Manual for my Amp/DSP Helix: https://www.audiotec-fischer.de/media/pdf/3c/86/6c/HELIX-V-EIGHT-DSP-MK2_Web.pdf

It talks about setting up the internal jumpers properly when using High-Level inputs and I want you guys that are more familiar with all the latest gear for expert help on doing that. Remember, I'm from the days of 8 track and cassette. I believe I want to set the Helix internal Jumpers on the "A" series jumpers so I can set and control all 8 Focal speakers/SUB with the Helix software??? Is that correct??? Anything else I missed?

If you have any other input tips for my build, I'm all ears. Much appreciate any help!

Best
 
Isn't the OEM location of the jumper the A location shown for OEM head units?
there are 3 different places for the jumper - A, B or C. I think I want the A but was just checking With you experts.

Doesn't the 365w come from an external amplifier that's no longer being used?
no. The original amp is still there and the speaker outputs from it will go into the Helix High-level inputs. I bought a parted out amp from ebay, same one in my car, to use the pigtail connectors and canabalize one of the connectors on the eBay amp to make a T connector. No vendors make the connector yet. See pic of pigtails