Got a 1988 crx hf with swap b20b4 with b16 head and I have a jumper harness from god knows we're and it has two black wires but I don't know we're it came from so if y'all have any idea were it might of come from let me know

 

I'm sure that just about every harness has black wires.
Is there something wrong with your car?
Or are you just trying to identify the unknown harness?

Pictures might help.
Maybe not, but worth a try.

 

Both trying to identify what wires are what and Idk harness brand and if I find out what brand then I can get the diagram I think it's just a cheap harness