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ECM wire diagram. on 2001 Buick Regal

A customer brought us a used car that had a lot of electrical problems. after inspection we determined that it was the ECM located underneath on the driver side. There were a lot of splices that apparently was to a previously self-installed remote starter switch. I had to solder and heat shrink the splices that were left exposed. Also a brown wire was left pulled out of the ECM connector. My question is where does this one brown wire plug into? Thank you for any help.

Asked by for the 2001 Buick Regal
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Need to know what engine is in this car. Either a Vin code 1 3.8 SC or a Vin code k 3.8.