Removing inside engine cover on a class A motor home

My Workhorse has a hole for an Allan wrench at the back of the dog house on the top of the dog house. Take an ice pick and lightly poke around you should find it. Just a bit before the back end of the dog house. If you got a packet of books with the coach there should be a wrench in there that fits it. Just turn the wrench about a half turn after inserting in the hole. Mine sets so far down in the carpet pile I use a screw driver to raise it to get my fingers under it.