I agree with both Jim and Charlie. The furnace
on my 77 Scamp
has a round vent hole and is located in about that spot.
Many rural areas don't have natural gas so there will be propane suppliers and they service propane appliances or can recommend someone that they send their customers to for propane work. But propane gas lines themselves are pretty basic plumbing task.
I also agree you need to be sure the chimney from the fridge
burner is not clogged or blocked as was suggested on the last page. Spiders and wasps seem to gravitate to obnoxious places like that which are hard to see and get to but when blocked cause problems.