Quoted from eaf67:
As cottonm4 said.
All Stern pinballs (Bally too) share a common architecture, and only the final connections to solenoid, switches and lamps are specific to each pinball.
Download the schematics for seawitch at IPDB, see
About the specific parts, I've received the info from him and I can't share it without his approval.
If you search in IPDB for Nine Ball you can download the owner's manual without schematics.
I already have him covered. Plus, I have one additional scan that I am going to send your way, as well. But you do not need my approval to share those. Pass them around whenever you see the need. But thanks for thinking about me; That is very kind.