It’s always better to go with bigger wiring, especially for DC. 26 AWG just isn’t going to cut it for providing power over long distances. If it were me, I would find a power source near where I want to mount it and use an OEM V1 wire. If I wanted a kill switch in front and a mount in the rear, and it’s too far to use the factory hardwire, I would run standard ~14 AWG wiring to the back and use that to tap for the factory hardwire. Get the full voltage to the hardwire, then let the hardwire do its job.