jimstem-
If memory serves, Ford changed to the newer connector, located behind the change cup, in the E-series 2016 model year.
For your 2014, connector is located to the left of the steering column, per Ford Bulletin Q-206 (link
here).
I recommend you do not cut the Ford-supplied wires for any reason.
Ford supplies a pigtail to the motorhome manufacturer. It has a matching connector on one end and bare wires with labels on the other. If the manufacturer attached the pigtail, you'll find the labels. follow the wires upstream until you get to the connector, then detach the connector, take the pigtail to the bench, and splice your electric brake controller harness wires to the pigtail wires.
Or, if you are installing a Tekonsha controller of recent vintage, buy the Tekonsha adapter 3035-P (link
here), and you won't have to do any splicing at all... plug-and-play. Very quick installation.