The usual way to find these is to turn on the hazard flashers and walk around the coach, listening for the sound of relays clicking. Make sure the engine is off.
has pictures that show a box that may exist on your coach. Note that the OP on that thread said he had a box that looked like the one in the picture, with the same connectors, but was marked differently.
Monaco/HR made some wiring changes in the 2005-6-7 model years, so your coach may be different than shown in the pictures.
You might also look in the front run bay to see if you have fuse boxes that look similar to the ones in the pictures. They may be marked "Monaco 1 "and "Monaco 2."