wiring problems with swap

[twcustoms]

I just bought a 1990 240sx from a guy who did a ka24de swap into it. With an automatic transmission. The new motor came from a '95. I have a ka24de engine wiring harness from a '91 that does not fit up to all of the connectors. And there is another harness that is from the '95 with the ecu...but it has been spliced and diced and also does not fit to everything I believe it should. The 90' harness for the headlights that runs through the front bumper is still there but after that I'm confused and lost as to what year harness, interior and engine I need (this is my first nissan project). Any help is appreciated.

[bruinbear714]

Most of the wiring should line up - if it doesn't fit, it's because the plug type is different from 91-93 and 95-98. Older KA harnesses uses the metal clip to hold the connector. Newer harnesses has a tab on the plug.