I did the E to DE swap like 3 years ago. I don’t see how you can not know where the plugs go? You just start connecting and the wires will kind of just fall into place with the DE harness in the bay. I cant think of any plugs that will even plug into another spot correctly. There also is not even any re-wiring or modifying to do in the engine bay its all stock. The only modification is under the dash.
I have a link for a 91-94 s13 FSM that i can get you when I get home later if you would like but those wiring diagrams are tough to decipher.