How to add TERMPWR to SCSI bus via HD case

[gachenb@eis.calstate.edu (Greg R. Achenbach)]

OK, I need some help here.  I have run across the dreaded "no
termination power" problem.  I'm using an Apple Rev C SCSI card in a
ROM 1 GS.  I have the documentation on how to modify the SCSI card by
adding a diode.  But, I'd prefer not to do that.  I don't have a
heavy duty power supply, and don't want to strain it anymore than I
have to.  My question is - How do I modify the drive case to supply
terminator power?  It should be fairly easy to connect the HD case PS
to the SCSI connector.
 
1.      Which pin of the DB-25 SCSI connector is the one that
supplies termination power to the bus?
 
2.      What voltage line from the PS goes to it?  It seem to me that
I remember it being the +5v.  Right?
 
3.      Should I put a fuse or diode or some other electronic gizmo
in between, or is just running a wire sufficient?
 
4.      What else do I need to know?  I'm not an electronics whiz,
but I know which end of a soldering iron not to touch. (I didn't even
need to learn it the hard way :)
 
Thanks in advance for all help.

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Greg Achenbach             gachenb@eis.calstate.edu (soon to be ctp.org)
Los Angeles County Outdoor Science School

"Society is like a stew.  If you don't keep it stirred up, you get a lot of
scum on top."  Edward Abbey