> meaning that a sheared wire couldn't be handled by [...] combining parts of two mice.
Well, if you're stealing them, you only need parts from one mouse: cut the cable close to the mouse, untangle it from whatever crap it's locked to, take mouse and cable home with you, disassemble mouse, feed cable back though (I think it's called) grommet, strip cable, pick out wires, solder wires to approriate mouse internals, reassemble mouse, done. You have a working mouse with only slightly shorter cable than before.
The point of using soldered cables for security is that setting up a soldering iron near a computer is conspicuous, so you get caught if try to install a attiny85 inside the mouse that way. You can still steal stuff just fine.
Well, if you're stealing them, you only need parts from one mouse: cut the cable close to the mouse, untangle it from whatever crap it's locked to, take mouse and cable home with you, disassemble mouse, feed cable back though (I think it's called) grommet, strip cable, pick out wires, solder wires to approriate mouse internals, reassemble mouse, done. You have a working mouse with only slightly shorter cable than before.
The point of using soldered cables for security is that setting up a soldering iron near a computer is conspicuous, so you get caught if try to install a attiny85 inside the mouse that way. You can still steal stuff just fine.