Ok... . geezzzzz... ... those "what the heck are they's" are caps for the injector top. Some use them, some don't. They can be hard to get on but they basically provide a cover for the injector top to help reduce water/dirt etc from getting down the inside of the injector body/barrel... (my word). These parts get put into most of our kits to save the customer from "having everything but the one last item" which got overlooked...
Right now, I do NOT have them in place on my POD's...
Oh, if ya want we can send you a HX35'd PDR'ized H1c... . but hey, then there's no challenge to it is there.....
Ya also, don't bend the adaptor barrels, just use some grease or vasaline to hold in place while installing. Also, use just a scootch of anti-sieze on the threads to help later in life...
PB...