Well,
   browsing the manual, the only diagnostic plug I could find is
under/behind the glove box for both the LHD and the RHD cars.  This SCS
(Service Check Connector) seems to perform troubleshooting for both the
Engine Control Module and the ABS Control Module.   Once the SCS is
jumpered, the diagnostic code will flash on the instrument panel.  The
check engine light will flash it's code, and the ABS light will flash
its code.  Hope this helps.   If still confused maybe offer more
information about your question.

There isn't one. Unless you mean the "Service Check Connector" for the
Check Engine light.
For that, click here:
http://www.iequus.com/assets/manuals/3173_ICCR_E_14JAN03.pdf
See Page 15.

Yours will probably be very similar to the '95 Odyssey. On the Odyssey
it's plugged into a 'dummy' plug that's mounted on the glove box
underside, to stop it flopping around and rattling. There were two on
the Ody. The one you want is the one with two wires. Unplug it and put a
jumper into it. Don't force anything too big in there or you might bend
it.

'Curly'

Pull out the ashtray...right behind that you should find it..