I bought a used Durkopp Adler 205-370 sewing machine which works great. I wanted to make sure I understand the lubrication system, so after taking off the end cover (cover with the secondary tensioner on it), I noticed 2 oil tubes that just hang down and drip on the frame of the machine. Can anyone tell me how these should be routed? I printed off the manuals but don't see a diagram or description of the oil tube routing.