A lot of states are now calling a towed vehicle a "trailer" and in most states, trailers weighing over 3000 or 3500 pounds are required to have operational brakes. There are several "automotive braking systems that sit on the floor under the steering wheel and accomplish this requirement.
This forum is a "towable RV" forum, Keystone does not manufacture any motorhomes, so there's limited information available on this site.
You'd likely be "better served" on a motorhome forum. There are several on the web, one, which is owned by the same company that owns this forum is located here:
https://www.irv2.com/forums/ There are specific forum sections for Class A, Class B, Class C and "general" motorhome discussions.