It could be that there were different versions of these things, I don't know. Mine came with instructions, which I read, though unfortunately did not take any meaning off the page. Then I disassembled them completely and lost the instructions.

The rest of the process is hazy in my memory, but I do know that in the absence of printed instructions I had no trouble reassembling the shifters in a way that made more sense than the way they had come apart. The first thing you want to do is attach the clamp to the handlebar, loosely, with just the butterfly shifter bit attached, and play with it with your hand on the brake lever; figure out where you want the shifter to go. Now take everything off it and tighten the clamp. Note that the clamp has about six holes on it; and the next part to go on has evenly spaced studs that can register with any of those holes; so you have six rotational options, and you have to pick the one that works best for you. In all likelihood it wont be the way it came from the factory. Anyway, once you know where that piece goes, you'll know where the cable housing has to end; tape the cable housing in place and wrap the handlebars before proceeding with the shifter assembly.

As for shifter assembly, I don't remember the details, but I can tell you the way I eventually had mine set up, the indexing was at one end of the rotation. The lower end, I think. By which I mean that a full rotation of the shifter, from one extreme to the other, with no cable attached, went something like this: ______________________1__2__3__4__5__6. So I set mine up to do all the shifting down at the bottom end of that rotation, where the shifter works in friction mode.

All this while I sit in my office, many miles from my Suntour Command shifters. I hope this helps!