The front of the chassis has a small hole drilled into the plastic to allow a single wire through. Infact, it will take 3 wires, but will need to be opened out to take 5 wires. Don't simply drill a bigger hole - this risks chopping the stalk off. Use a tiny drill to widen the bottom of the hol, or hollow out the chassis base under the hole, or make a separate smaller hole further over to each side of the present hole to get a single wire through.