Something got stuck in the nozzle for which I actually had to disassemble it. After removing the screws I got called away, upon my return the part with the ball joint had fallen out of the the nozzle part. This is where I am having issues with: I can’t reattach it, so that it will stay in the nozzle after assembling everything, it just falls out again.
Attached please find some pictures:
1.jpg - these are the parts. Part A is to be inserted into part B and should be held in place by part c
2.jpg - Part c contains a spring, which, I suspect, is used to fixate a bolt or ball bearing?
3.jpg - shows part A being inserted into part B but still missing part C. If I am not mistaken, the yellow arrows point at an area which is slightly circle shaped. This is where the spring of part C would go and I assume, that this is where I am missing a part...
As already mentioned, I suspect that I am missing a little bolt or a ball bearing, but can’t find anything in the vicinity. Can somebody explain to me what part(s) I am missing or what I am doing fundamentally wrong in the assembly process? Thank you very much in advance!
Unbelievably, shortly after posting, I found this little white plastic part in the picture below, lying on the floor in the middle of the living room (where I did not take the nozzle apart). This was the missing part, the nozzle is already assembled. I had been scratching my head for days over this with no info on the net to be found, Just in time before I caved and had to buy a new nozzle 
