Good to hear that it worked. The way you did it is more or less the way that I intended to hint to: The cable has to be tight on the rear end at the dog leg and achieving this works pretty much the same way as you would do with any derailleur (or brake). The cable is less tight in the higher gear, therefore when fitting the cable it might be appropriate to bring the shifter to the higher gear-postion.

Two additional tipps for those who convert their bike from the old lever to the new ones:

- The mechanism how the shifting at the rear end works mechanically stays pretty much the same. But by the clamping of the shifter-cable at the dog leg there is now the need for an additional mechanism to extend the cable (mechanism) further towards the back end of the dog leg (as it was previously provided by the shifter cable). This is done by a short (second) cable which is clamped by another bolt close to the front end of the dogleg. This is alreday mounted at the factory. I'd recommend checking the tightness of this bolt before mounting the dogleg onto the bike. I had one case where this bolt was not tight enough and the dogleg disintegrated itself when I provided tension by mounting the shifter cable. And as there's a spring inside the dogleg spread itself springloadedly throughout the workshop. Finding and puzzeling together the parts again was no fun, thus: Better check before mounting.

- The second tipp: If all of a sudden your two-speed refuses to shift to the lower gear the reason may be that the attachment of the plastic rear end of the shifter cable on the small wire thing that you can see in Pongo's photo above on the right side came loose as it is just clicked onto that wire. No a common issue as far as I know but I had that on a friend's bike (that came with the new shifters from the factory) after a few months and it took me a couple of minutes to figure out what the issue was. Fixing is a 2-second-job: Just click that thing back onto the wire. So if you suddenly have issues with a usually reliable derailleur shifter check this spot, it may safe you time.