if 5 min is your judge, I don't think it is an issue.
the wires do come seperatly, and maybe feets will join in and look them up.

I have the controler on mine set a bit low. so I know it runs flat out the entier time the car is warm enough to fire it up.
I also had without a controler where it just ran flat out the whole time the car is on.
never had an issue.
now I probably haven't kept the car running more than an hour or 2 at a time as I haven't taken it cross country or anything.

I also compared the wiring to an r-class and it seemed to be the same.