The 5100 and 7100 series have a "secret" to their disassembly.
Remove the belt clip. There's a short T6 Torx screw under its space on the back of the radio. Remove that screw.
The back section of the radio above the battery compartment is a plastic cover. It snaps
onto the radio and is secured with the screw.
To unsnap it, insert a flat bladed screwdriver into the receptacle on the upper inside of
the battery well. Pry gently at each side and the plastic back cover pops off. Remove
that cover, and now the last two screws that hold the radio together are accessible.
The Jaguar, 7100, 5100, LPE, and MRK all use the same programming cable.
Elroy