KA24DE lower engine harness wiring HELP!

alright so i pretty much gave up looking for another engine lower harness that is uncut for my car (1995 240sx), the car had been converted from automatic to manual, it runs good and everything but the only thing that is not working and bothering me is the speedometer ( i have to use my gps for my speed LOL). the person that did the conversion for me told me that the harness is completely fcuked up and he doesnt want to bother figuring it out. well if anyone out there is really good in wiring or want to figure this out let me know, and of course i will pay you =D thankz.

ive got a fsm sitting at work. ill take a look at where those speedo wires go. then you can just run 2 new wires to your speed sensor so you dont have to pull the harness all apart