I haven't taken any pics yet and I am exhausted right now, but I cut this standard midi cable in half and using a multimeter, I spliced the wires to match the continuity of the mini-din-male/midi-female cable which had come with the SCC-1 from the ebay seller. I removed the MPU-IPC-T to avoid conflicts. I tried both Space Quest III and Ultima: The Savage Empire as they both display a sysex message on the screen in addition to the green light, which would have let me know if it was working.
It isn't.
So a standard midi cable going from a mini-din adapter (I also tried my Creative adapters) to the MT-32 AND a spliced cable matching the continuity of the pins on the mini-dins have both failed to work to use the SCC-1 as an interface. Unless I made a mistake in the wiring somehow, I think that the previous owner somehow fried the midi ports without frying the whole card since I can use it to play game music, using the RCA jacks. I have been tinkering with this off and on since I joined this forum (though I am glad to have joined, as I love this place and think everyone is cool and we all share a love for a past golden age,) so it is depressing, to say the least. I may sell the card (indicating the issue with the ports) and either go with an X2GS, or an external Sound Canvas and simply use the midi thru and a selector switch for running either MT-32 games or later GS/GM games. Or, I could put the SCC-1 in my PIII build which has a Live! for Win98 games and an AWE32 PnP for dos games which the 486 can't handle, and use the SCC-1 for GM in those games, since I don't play 486-era games on the 486. Another option is to build a Pentium 166MMX system with a Voodoo1 (I had a Pentium 90 with voodoo back in the day, but never got to experience GM back in those days as all I ever had were SB clone cards and never knew what I was missing out on.)
Or, I could say screw it and simply give up on real hardware and go with dosbox and 86box for everything. I can build my physical 486 in 86box with the same motherboard (4DPS,) same sound card, and a Mach64 variant (I am using some form of Mach64 overkill board simply because of Win 3.x drivers) and use Munt and Sound Canvas VA and play games in 70hz on my freesync tv and actually enjoy playing games since all I have been doing is build, tinerking, tweaking, and diagnosing component issues over the years rather than play my favorite games.
I am still open to advice and trying to fix this card because I have a difficult time giving up, and I appreciate everyone's efforts over the years and for dealing with my posts about this damn card. I'll play MT-32 games until I figire out how to get GM in the same machine, as I have no shortage of back catalogue games and games which I would love to beat again.
Thank you all!