Hey, for the jack, did you check you got the right pins with a multimeter?
The parts are not really consistent between different kits so I wouldn't rely purely on what others have done.
When I did mine I plugged a jack lead in the socket and tested with multimeter to see which pin correspond to tip (hot) and which one to sleeve (ground).
For the bridge I'd sand the area where the wires will touch to bare metal to remove the paint. But you can actually test with a multimeter again. Screw your bridge in place on top of ground wire and test you have continuity between bridge and the ground wire in control cavity.
I usually test all my grounds before closing. Super quick test, one side of the multimeter on the bridge and with the other side touch back of each pots, ground lug of jack, etc. To make sure all ground are happily connected.

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