Ahhh...removed and filled. That would make sense then. I didn't expect a grey water holding tank, after reading that it was very common on the older campers to just dump the grey water right in the ground before the environmental movement really took off.
Probably should have looked into this a bit more before installing a regular faucet in the new counter, lol.
So then perhaps there would have been a battery and/or power converter installed in the forward compartment where the wires are, and the two large holes there may have been for an outside electrical connection?
I was thinking of putting a battery or two in that forward compartment, add a power converter, and fit the biggest fresh water tank I can in the remaining space to help keep weight centrally located. But now that plan is on hold as well, as I've began to seriously look at bigger flatbed trucks to more or less permanently mount the camper on (still using proper tie downs, but just having a truck dedicated to the camper) to also have more weight carrying ability to add tanks outside the camper.
