A little more info and I could probably address the issue more precisely.
But, it could be the reverse sensor cable or the speed control sensor cable.
What exactly it not connected? What does it look like? Where is it located? These will help in the diagnosis.
E
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1991 5.0 LX Coupe - 38,000 miles
13.17 @ 106.14 mph w/ 2.138 60'
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