x5 E53 Retention clip for hose coupling to air spring is missing= danger?

[omodos]

Morning all I am in a sort of panic mode again apologies, arnott air springs installed at rear friday so far so good, got car Fri evening and dug around in rear to see what was done. Mechanic infromed me he couldn't get the one hose off one of the old springs so he got a replacement hose/vacum reservoir as these things come as a package so to speak (nuts).

I noticed though that the hose coupling connected to the air spring doesn't have the retaining clip on it, is this dangerous will hose fly off whilst driving? BUT also going by various posts and please see photos, is the purpose of the black retaining clip indeed to retain the hose coupling to the air spring? or as per image I dug up is the plastic clip a means of releasing / allow re-insertion of hose coupling into the top of air springs? anyone had any experience....can I leave as is without the clip and hope the 'left over clip' can be slid in/around coupling the future in the event of maintenance being required and removal of coupling? Yup they left the clip in the packaging that came with new springs...!What baffles me is how they got the hose coupling on without the use of the black clip...i am hoping not brute force....