You've already put the cable through both holes and the bars, and now you're sliding the housing over the cable and into the bars... right?
Or, were you trying to get the housing through both and then thread the cable through afterwards?
I haven't done it so may be wrong... but I would imagine that you do the cable first, and use a loop of cable to catch it and feed it through the other hole. And then sheath it with the housing and use the cable as the guide for the housing inside the bars.
You've already put the cable through both holes and the bars, and now you're sliding the housing over the cable and into the bars... right?
Or, were you trying to get the housing through both and then thread the cable through afterwards?
I haven't done it so may be wrong... but I would imagine that you do the cable first, and use a loop of cable to catch it and feed it through the other hole. And then sheath it with the housing and use the cable as the guide for the housing inside the bars.