The wires at the door memory seat switch all match those going to the seat. The best way to do the task is to begin with as much of that wiring as possible. Get all of the door wiring for the memory seat switch, it will plug right into the door jamb connector. Get at least some of the mating wiring from the other side of that door jamb connector. It takes a tiny screw driver or pick to "catch" the tiny plastic locks/levers which hold in wiring connectors.
If you get those wires, then it is obvious where they go at the seat. That leaves just four other seat wires. There may be an extra big ground wire, that is no big issue if that's the case.
Of the other wires at the seat(not leading to the switch(which has matching colored wires)), two will be the same main ground and power wires as a normal power seat. One will be Green/Yellow, the other is Red/black(93/94 Limited's have a red/blue wire for this function).
The GN/Y wire is for a power for the memory seat module, I had the proper Limited dash wiring, so it plugged in for me. That and the R/BK wire will likely not be in the floor(body) harness of a non Limited.
I suspect that the memory seat module doesn't take much power. The GN/Y wire is separate on a fused circuit of its own. You could use another power circuit, such as the main seat power wire. It's a matter of easier troubleshooting with the OEM Limited wiring, don't make too big of an issue of that.
The other wire is more important, that R/BK wire is for a signal to tell the memory seat that the vehicle is not in gear. I cannot recall if it a switched on wire, or switched off. Since the signal is in presumably all of the GEM modules, just run a wire for that all the way to the GEM. You should be able to find the right pin of the GEM for it. Worse case I could pull my radio out and find it, and take a picture.
I do remember tracing it down through the dash wires. Do not waste any time trying that, I discovered that there are a bunch of tiny R/BK wires throughout the dash. Some are the same, this one needed for the seat is alone going to the one pin in the GEM. It goes very very near to the bottom of the GEM, in the lower of the three connectors.
That should cover most of the details, work on getting nearly all of the OEM Limited wiring from the door switch to the seat, especially the connectors. Regards,