Ok I give up, how do I get the cable housing in there? It just seems to go in but then wont go around the corner.
push harder. I had a lot of gunk in there (excess epoxy) and just pushed it through.
alternatively you could try feeding a cable through the housing, putting the cable through, then using the tension with the cable that is already through to guide it in.
I was fashioning a hook out of an old coat hanger to get the housing but force ended up being enough.