May as well add an engine then you can hop on and drive to it to the job site lol
There have been a few posts about fitting a bulkhead coupling in the rear panel similar to a quick release airline coupler, only smaller to allow the bottle to be disconnected. I can’t remember what make of coupling was recommended. Search the gas & regulator section, or put a post on there asking the question.
Edit found it, rectus 21 fittings