So I ended up going a different route and installed a 3 way 15amp switch for fan on/off/thermostat and did it by cutting the R/B wire on the fan side of the plug. I ran the fan side R/B to lower switch position, machine side R/B to upper switch position, and 12v fused at 15 amps from the battery under the hood to the middle position of the switch.
I did everything on below the fan plug, so if I had an issue or wanted to remove, I could replace the fan and remove everything cleanly and there would be no spliced wires or anything.
I mounted the switch up under the dash through one of the existing holes. I like it back up and underneath because it won't get bumped, and it's still accessible to shut the fan off for a water crossing, and in the event I have a bad relay I can flip a switch and manually run 12v to the fan essentially taking any other variables out the of the equation. If with my switch turned on the fan doesn't work, then I know it's likely a bad fan.
Cheers