Proform 850 dialing it in closer

Best I an figure Innovate Motorsport LM2 uses Molex "Mini-fit" connectors. (Terminals are rated for 9 to 13 amps.)
Housings, terminals, and even premade cables are available from the usual places like Mouser, Digi-key etc
Mini-Fit Family Power Connectors - Molex
I was trying to decide how big of a inline fuse to us. And was amazed that the o2 heater only took 3 amps.