I have a 1976 that I have been repairing the windshield wiper system,. I during the reinstalling the wiper system, Air box and Fuel tank I noticed this brown ground wire in the wiring harness under the wiper system that I have not idea where it does. I have the two grounds connected to the wiper system.

Does anyone know what this ground cable connects to? From looking at it I am guessing it was not been hooked up to anything is a long time. The photo below shows the wire as it current under the air box and wiper system..
Click to view attachment
thanks in advance for your help.

It’s for the optional wiper delay relay harness.

Thanks Jeff, I did not want to put the gas tank back in and have to removed it all again to connect this ground wire if it belonged to something I did not get connected correctly.

In the morning going to drop back in the gas tank and should be back on the road. again thanks