vss

hi . i have a 89 5.0 with no mass air flow sensor t5 and the electrical wire of my speed sensor is cut , what is the purpose of these wire? ty

So I bought this 97 gt coupe for 1300. I knew it would have some issues. Well I put a rebuilt transmission in it with new clutch and flywheel as well as new cable and quad. Mechanic says someone cut the wires for the vss so I got a replacement for him and he installed it.(the speedo didn't work...