u/Constant_Care_5795

update; thank you!! I also thought the chain looked too long. Will Take out a couple links to tighten. will also take a look at the info provided for the cable. Thank you!

fixing up an old schwinn bike for my sister. Just replaced chain and tires, and fixed up the brakes. does anyone know what this cable connects to? I know nothing about bikes. It is connected to what would appear to be a shifter but this is a single speed.