If it's a lot smaller. Maybe one of those gimic "one size fits all" sockets with spring mounted pins in it. (Usually sold just before father's day or Christmas).
I've heard guys like them for wing nuts. I wouldn't a third wing to be much different.
Not sure why you describe what want to do as temporary. An interlock or transfer switch and inlet can be installed on the building (or pole). No issue with plugging in a portable generator. That's how I set mine up.
What is the fuel source for the generator you bought (propane or natural gas)...
I lined the inside of mine with rigid foam before I poured the floor. Where I have plywood walls I covered the foam with aluminum flashing. In the areas I drywalled I covered it with PVC sheeting.
I'd look in the basement/crawlspace. Is there a beam, post or wall beneath it? What about the rest of teh main floor, is there a wall in line with it. What additions have been added to the house? Are there any clues you can use to figure out what the original layout was.
Size, heat, power level, frequency. My small one seems to do a better job on jewlery and other small items than if I put those same items in my large (more powerful/expensive one).
The size of tehDremel tool is an advantage. The thin cut off wheels are also an advantage. I've often wanted larger diameter wheels. I did buy some Dereml cut off wheels that are 1 1/2" diameter but they fail where they attach to the shaft.
Digikey, Mouser, Newark. It may be difficult to find a preinsulated terminal with the strain relief crimp. I'd use heat shrink.
Ferrules aren't hard to find but that one looks like a portion of a terminal.