Like most everybody else i use a CTEK. but I have fitted the extra extension lead. This has a rectangular dashboard fitting but have made up a bracket that screws to the rear bulkhead so i can plug it in by putting my hand under the tonneau or hood just by undoing a couple of press studs or turnbuckles.
The other end is permanently hardwired to the battery and has an in line fuse. takes a few seconds to connect.