my old bsr xl-1200 cartridge is wired onto the pins so it wont pop out
with the 4 prongs as normal one's do

Louis-

I have an old cheap BSR changer that was sold by Radio Shack. It has slide-on
terminals that connect to the cartridge pins. The cartridge is held in place
by two screws. Are you sure your cartridge doesn't have slide-on terminals?

I also have an old Dual changer that uses a cartridge adapter. The adapter
pops out when a "lift arm" is rotated. The original Shure cartridge is glued
into the adapter, but it also has slide-on terminals. I believe it would ruin
both the cartridge and the adapter, if I tried to separate the two.

I've had the Dual for about 25 years, but recall adapters that used cartridge
mounting screws, were available for other cartridges. If BSR is still in
business, perhaps they would have an adapter that is compatible with your
turntable.

Fred