Path mate issue

Hi guys,

How do I make this tube follow a specific path using a path mate? The idea is to use the midpoint as reference as a path

The tube is made using swept boss.

No matter how hard I tried [even with the filter vertex], I'm not able to select the vertex.

I tried adding a reference point, but when trying to add a reference path, I always get "Please select path and vertex from separate components"

Help is appreciated, thanks!

SolidworksAssemblies