I'll tell you that it is a pain to get that coil sprung enough to attach the cable because there is so little slack. I have replaced the cable and the handle assy on different cars. It's not hard at all, it can just get frustrating when that damn spring pops back when you "ALMOST " have it locked in. Put the cable in from the underside, above the DS in the small square hole , then use vice grips to hold it from falling while you turn the spring.
I tighten the spring by getting another pair of vice grips and locking the spring as I turn it little by little. Eventually you will have the cable hole available to attach. release the vice grips and wala. Just make sure the brake handle assy is attached when your doing this. It won't work if you don't bolt it down.