Changing pre on Cirrus BXP

I'm about to take out the pre on my Cirrus BXP and replace it with a John East U-Retro.

However, I've just found out that the pickups are also active and I'll need to figure how to hook them all up.

Does anyone have a schematic/pinout of the Cirrus BXP I can look at? It would sure help.

Thanks in advance.

 

I'd sure like some help on this before I start pulling things apart!!!