I'm trying to build up a vintage steel bike for the first time and got to installing the rear derailleur. However when I tried installing the gear cable and rear derailleur cable housing (this is for downtube shifters) the cable housing that is closest to the crank will not sit flush against the knob in the frame. You can see this in my photos that the cable housing just pushes straight up rather than running smoothly with the gear cable.
I haven't put the chain on yet, but you'll see that if the rear derailleur were in the same position without the wheel in place, the cable housing isn't sitting flush against the little knob where the housing is supposed to sit. On my other vintage bike they run fairly smoothly. I'm not sure what the issue is here and this is my first time building up a frame so help would be appreciated.
Could it be that the cable housing length is still too long? Is my cable tension not tight enough?
