Were it me, I'd just run wires from PP board to optiwiz and solder to the pins on both.
If you have a lot of spare PC or scrap electronics stuff lying around, you could probably find some 4-pin or couple of 2-pin connectors with wires all ready to go you could make a harness out of.
Or order the trackball harness for the optiwiz, cut off the 6-pin connector and replace with a 4-pin connector from mouser, digikey, rat shack or wherever - stow or cut the extra 2 wires. (or ask Randy at GGG if he has a 4-pin connector or harness - he probably has run into this kind of thing before with people hooking up various spinners, steering wheels, etc).
Some PP pinout info (in case you don't already have it):
PP board pinout
here from
this thread.
Another related thread
here .
Depending on what PP board you have, it looks like it could be as simple as matching up G, +5, X1, X2 on the PP board to the same on the Optiwiz (or whatever axis you have free or feel like using on optiwiz - may run into some extra config if you use the Z).
If you have the larger PP board, it's just a matter of removing some junk and running some jumper wires first.
Edit: in 1st pinout link, looks like pic of larger board jumper wires doesn't quite match up with pinout in previous pic. (maybe just example of running jumper wires - not intended to show final result?)
