2002 e825: is there a fuse on the 12V aux/radio output?

My batteries (22S) hit 4.03V last night so were just over voltage enough to trip the controller warning. I tried the LED headlights and brake light load to no avail. Then added the 2A load onto the 12V/Radio output but that wasn’t enough so I added another 2A(4A total) and blew that 12V Aux/Radio output.

Any chance there’s a fuse hiding somewhere?

Thanks Rodney (@Old_Houseboatrr)!