Anyone know what this wire is for?

I redoing a couple things under my dash and ran into this wire. It's a yellow wire running down the length of the dash to the passenger side on top portion of the kick panel. It wasn't plugged into anything and it was snipped on the other end so I pulled it. The car is a 68 Dart A/C car. What under the dash on the pass side uses barrel connectors?

Thanks!