Okay so first off still a newbie here. But I am doing a 2.5i conversion to my E, so I got the engine with the harness but my question is why does the spare c101(round) I have, colors not match the harness.
Also is there a difference in automatic and manual harnesses?
Also I'm really bad at electrical and kinda wanna get this swap done asap. Any advice on making a square to round c101 adapter? I've found the page saying what goes where like number to number but still the c104 does something weird.

Please don't yell at me I know this is all pretty common questions but I can never find what I'm looking for when I search this stuff. I've had the engine in my garage for 3 months waiting to do the swap

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Okay so I figured out the c104 thing take
Cut pin 6 and pin 32 I believe at the ecu and splice in pin 1 and 3 respectively.

Now so as for the adapter if I use the diagram that I can't figure out how to post.

But says
Rectangle c101 Circle c101
Pin1 Pin 1
Pin2. Pin2
Pin3
Pin4. Pin4
Pin5
Pin6. Pin6
Pin7. Pin13
Pin8. Pin18
Pin9
Pin10. Pin7
Pin11
Pin12
Pin13
Pin14
Pin15. Pin10
Pin16. Pin5
Pin17. Pin11
Pin18
Pin19
And cut the wire going to pin 20 so I don't smoke my harness?

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Totally just realized this is in engine tuning and that's not the right place for it idk how it ended up here sorry guys