You need the 93 connectors for the 93 PCM and just swap the pins one at a time
from the 92 harness into the 93 connectors. Since the 92 has a 24 pin connector and a 32 pin and the 93 has 2-32 pin you'll need a wiring diagram for each so that you move the pins to the correct location.
This might help. It's the 93 pinout;
Here's a 92 pinout from my files:
If you stick a bobby pin in under the pin it'll slide out easily. May take a but of tinkering to figure out the first one, but once you get the first one the rest are easy.
For example injector A will be pulled from position D14 in the 92 connector and go into A9 on the 93.
So I have figured out the majority of the wiring but I am left with some that I am unsure of and I don't want to just guess.
So on my 93 ECM-
B-15 _ dk Blu - knock sensor, the 92 pinout doesn't show a knock sensor
B 16 brn, the 92 doesn't show EGR pintle
F16 dk grn, canister purge Sol. Not on the 92 pinout
E7 dk Blu/ wht, air bypass valve, not on 92 pinout
E13 ppl, brake switch not on 92 pinout
E14 gry, MAP linear EGR?
E15 pnk/BLK, IGN fused,
And then on the 1992 S10 I have most figured out but a couple I am not sure what pin to connect them to on the 93 ECM
B10 orange/BLK , park neutral switch
A11 BLK, TPS/CTS ground
C7 light blue, high gear switch signal
C9 purple/white, crank signal
And I believe I got the rest pinned out properly.
Any info I greatly appreciate a lot!