My favorite answer from vendors trying to answer my questions about their product: "It depends".
What kind of axle do you currently have on your PUP? What Make, model and year is your PUP?
It is possible to easily add brakes yourself if the small, square mounting plate is already there. Look just behind the wheel for about a 6"x6" plate on the axle mounted parallel to the wheel and has four holes in the corners.
If not, you'll need to probably take it to a trailer shop and have them weld on the mount and might as well have them install the brakes while they're at it.
We appreciate your awareness of the safety factor, as would anyone with you during a "situation".