The car was an AOD and now a T5. Looks like it used to be the jumper wires for the nss. But I don’t know why the jumper was cut in two and a relay ran to it. Would this be a way to bypass the nss instead of using a 10 amp fuse?
That jumper was originally the starter circuit jumper for the t-5. It connects to the cluth cable and allows the car to only start with the clutch in. On the AOD cars it's not connected and uses that jumper to allow the car to start if the trans is in P or nuetral.
I think someone turned it into a sort of kill switch. Stick a 5A blade fuse into the connector under the car if you want to eliminate it.