There should be a hole below the end of the equalizer rod where the spring attaches in the bracket that the front cable goes thru. It is easiest if you can look at another Mustang or find someone who has a shop manual. I can scan a picture from the manual if you would like.
I just bought a 66 mustang, and the parking brake didnt work. I looked
> under the car and saw the cable just hanging there. So I bought a
> cable equalizer, an adjuster rod, an equalizder lever, and a return
> spring and installed them all. But I could not figure out how the
> spring went. I know one end goes on the equalizer lever but where does
> the other end go?
>
> Evan
> 66 coupe w/5.0 and t-5