I've just lightly soldered the connections for the purposes of testing, I plan to tidy things up once I can verify everything is working.
The steps I've taken (bearing in mind that this kit comes with a partially pre-wired set of pickups):
Connected Neck and Bridge live wires to the 3 way switch
Connected Neck and Bridge ground wires to the volume pot
Connected live and earth wires to the input jack.
Before attaching the earth wire I can hear a buzz from my amp as expected, when I attach ground there is silence. However when tapping my pickups with a screwdriver (as shown in the Pitbull YT video) I get no sound. I've tried changing the switch to all 3 configurations, triple checking that the volume pot is turned up etc all to no luck.
I've attached photos to hopefully help, I'm suspicious that the pre-soldered connections on the volume pot are overlapping.