1994 v6 to a 5.0 wiring problems

[94 5.0 from v6]

I have a 1994 mustang and I purchased a 1989 engine, tranny, computer and wiring harness. I put new rings bearings clutch ect. now I have the motor in with no problems until I got to the wiring harness. I removed the stock wiring harness. (all systems still work lights airbags ect.) but the new wirinh harness was missing the part that plugs in to the adapter near the ecu the green one a couple inches away. and also I don't know how to get power to the new harness or where the fuel pump hooks up to this harness I have located the fuel pump wire near the kick panel and when I run power to it the pump works so it just a matter of getting power to the rest of the harness. any one know anything about this wiring harness???