As in extending the wires because they're too short? I've done that no problem before. Don't even usually need to disassemble the pickup. Can simply solder wires to each individual one extending it, making sure to add heat shrink so nothing shorts out.
If you want it to be ultra clean, you'll need to start disassembling it and soldering up which can be a pain. Recommend buying some pickup tape to rewrap it in that case, as well as creating a way to re-pot it.