When you obviously don't have a plan or have some sensationalized expectation of how things 'should be', sure.
Red : 12v
Black : Ground
Yellow : RPM
Do you even have any hard monitoring data for what temperatures you're trying to achieve? If your cooling solution is insufficient and the Xbox becomes a brick, you'll also have zero support. Have you even done any analysis to what you're implementing?
The XB1 gets a bit 'roasty' out of the top vent, but as an exhaust vent it shouldn't be that surprising. Also, the APU is rated for pretty large temperatures, and the Xbox can already manage its own thermal solution, so there's really no reason to monkey around when you don't know what you're doing.