Probably this not the last question I have about my new frame.

Here is the problem: The cable housing does not stop, but goes deeper and deeper inside the frame.
Please, see picture. It is hard to explain, but I will try:



I have ran the cable through the inner tube, and put cable housing with ferrule on. But as I slide the the housing down, it does not stop. As you can see on the picture the hole in the frame is larger than the ferrule. The internal cable housing is a plastic sleeve, but not the small, it has large diameter. I have inspected the best I could the the metal plate from the inside, and I found that the 3 internal plastic tubes runs to each hole. One of them is attached to the metal plate from the inside (the top one on the picture - it runs to rear brake, and there is no problem there - you can see the plastic tube in the hole)

But the two other plastic tubes are NOT attached to the metal plate from the inside. I do not know how did it happen, the frame I bought was used. I believe that the ferrule should be stopped by plastic tube. But I cannot fit it from inside of the frame into the hole on the metal plate.

Please, advise what I can to to fix the problem?
Thanks