Through the cable a very secure mount.

I don't recommend serving both above and below the string. If your string does break and you do need to replace it, it will be nearly impossible to separate the string strands between both servings considering it is only a 1/16" gap (or the width of your rope). If serving to your down cable, serve above the string. Vice versa for an up cable. The last thing I want to have to do after a string breaks is to have to take my hunting knife and try to cut a serving off.

Just a suggestion though.