Towing with a RDX

I want to tow a camper with my RDX. Camper weighs 1250 lbs but will be over the 1500 lb max when full of stuff. I want to get brake control for the RDX but the trailer hitch guy said that the RDX does not have a brake control for the connection. He said he would have to wire it through the firewall to the battery and custom wire the whole thing.

Is this right?