I'm at a loss. It also looks like there should be a plastic cover for the wiring.
I came across a P/N but can't find it again.
But nothing like a tube for the cable unless it's part of the cable itself.
Look at
http://s314139393.online.de/Artikelb...0/DSCI2882.jpg, are you sure it's not part of the cable?
And does
http://www.318ti.org/forum/showthread.php?t=27419 help?