Electrical cord in the right-front engine bay, hub? Electric fan controller?
By the way, did you enlarge the radiator opening to get the dual-fan system installed?
I'm hoping to get restarted on my project over this holiday break, so I might have some progress to post next month. Had some 'circle of life' drama to deal with recently. I also got a 2019 GT350 and started doing some track days. That's been a huge, but fun distraction!