The sensors are in the taillights but they are unavailable with the doors off, since the indicator is on the mirrors which show if there is something in the blind spot. Aka the lights are on the mirrors.
The mirrors are on the doors though, which is where the blind spot indicator is. Basically without the doors, blind spot monitoring and your mirrors don't exist.
Awesome looking Jeep! I sadly don't own a Mojave, hopefully someone can answer those questions. I believe it's 6000 pounds for towing. How is the ride on the Mojave?