Originally Posted by IthaDan

Oh come on. that's lame. There are two kinds of grip shift routings- ones where the cable end anchors in the [static] shell of the shifter and one where the cable end travels with the rotating grip. Figure out which one you have. The static end cable takes a figure-8 loop to get out of the shifter while the moving cable end is much more intuitive.

As far as the spring goes, there is a little "pocket' molded into the shifter body and the looped end is clockwise of the split end.

Of course you could always GENTLY disassemble the other side to take a look, but I'm guessing if that were possible we wouldn't be here.