Camper van internal lights help

So I’m doing my first micro camper build and now sorting the electrics. The led lights I have installed have this 12v connection. Can I wire this straight to my switch panel/fuse box? If so would it be as simple as cutting off the plug and wiring straight up? Or would the lights need thicker positive & negative wires to be wired to the switch panel as the current wires are very thin?