Mystery Wire

While replacing the fuel injectors in my 90 C4 I found a single red wire in a sheith thats attached to the upper inner fender on the passenger side infront of the heater. This wire seems to be some kind of a jumper wire with a male connector on one end and a female end on the other. Both ends are loose and not attached to anything.
My 91 camaro had the same wire in the same location. I thought somebody just added it for some reason. Does anyone know what this wire connects to or what it is used for?





