Not sure when Monaco started providing the trailer brake wires, but I found mine in my previous coach (2008 Safari Simba) in the left console beside the driver's seat. My current coach with Freightliner chassis, the wires were up under the dash and took me two days to find.
Good luck....those buggers are hard to find.
Ron
Ron & Sandie
2013 Tiffin Phaeton 42LH Cummins ISL 400hp
Toad: 2011 GMC Terrain SLT2
Tow Bar: Sterling AT
Toad Brakes: Unified by U.S. Gear
TPMS: Pressure Pro
Member of: GS, FMCA, Allegro
RETIRED!! How sweet it is....