I had the same problem. Its easy when you know how. It never seems to come with instructions though.
Remove those 3 retaining springs there now. Remove the metal retainer that is over your hub bearings. If you haven't done so, I'd also highly recommend you install "The Big Fix" bearing kit then too and install the thin plastic retainer that comes with that kit, under the Ram Jet retainer.
Install the Ram Jet retainer on the hub studs, with the 'A' 'B' 'C' letters facing outward. Toward you. If you have a 5 long stud hub, you will find that you can only get 2 of the A's, B,s or C,s on long studs at the same time. If you have a 3 long stud hub, you'll be able to get all 3 of the same letters on those studs.
Put the Ram Jet retainer on in such a way that you get either 2 or 3 as above, of the same letters on the long studs. Start by trying to use the 'C' which are the tightest and see if the lock rings will fit in the gooves in the studs. If they won't go, then try the B and finally the A. The idea is to keep the thing as tight to the Hub as possible. Install the lock rings. Put your clutch back together. Its worth the effort. Big improvement!
Hope that helps. They ought to spend $5.00 and re-print some more of those instruction sheets.