This took many trials to get perfect and is different from others such as for the Ender3 which doesn't fit the Geetech.
The standard extruder motors have metal outer parts which are slightly loose and this addresses that issue as well as keeping the pipes from moving. That is why they have a curved top to these. They only fit the extruder motor parts, and I believe clips for the other end going into the heat chamber is unnecessary.
UPDATE: Turns out they do fit the other end of the bowden tube and are necessary to stop stringing. Solved my retraction issues which are now 3mm less in Cura.
Technology Outlet PLA