Please help with manual transmission 1989 Miata ECU pinout

[Artek]

Working on the wire harness for my Locost Miata based project. I removed wires from the ECU connector. I made changes I needed and started to connect them back using the electrical schematics. Then I realized that I have one extra black wire not shown on the schematic.
I traced it back and it is a ground wire but where should it go into the ECU connector?
Can any owner of 1989 or 1990 manual Miata wire harness take a picture of the longer ECU connector from both sides?
Or if you have better schematic please let me know where the extra black wire goes.

Thank you.

This is what the schematic shows.