Hi, Thanks for your interest.
Too be honest, the pickups may be wired correctly as I believe one of the pots is for tone. As mentioned, I bought these new from https://www.gak.co.uk/en/emg-pjhz-set-pj-style-passive-bass-pickup-set-black/929082?gclsrc=aw.ds&gad_source=1&gclid=CjwKCAiA98WrBhAYEiwA2WvhOuWk6-DQ6mQ9i_mpYEgTY9B5MHIgo_cP-Hp7tHSeb188KP6cTkIVYhoCDssQAvD_BwE
Regarding the bridge, I decided to buy a fender hi mass bridge as the old bridge was on it's last legs.
Massive amount of interest from the US on this bass but very little interest in the UK 😉
42 nut and 16 radius. I'm more of a jazz neck player but found this bass to be very comfortable.
Any other questions, just give me a shout