There isn't one but there is a wiring harness either behind the dash or under the drivers seat but I can't recall where. One thing I do remember is that you need to run a #10 wire directly from which ever controller you choose directly back to the 7 pin connector located by the trailer hitch. I had the RV dealership install mine before I picked it up.
I did a search and found this thread that deals with a brake controller install on a MBS chassis motorhome. Post #24 seemed to provide some helpful information.
http://www.forestriverforums.com/for...-102016-3.html
hope this is of some help.