The release fork one is easy if it is like the older ones (It is a long, narrow clip, maybe 50mm long)
That one has a hooked end which slips into a slot in the clutch fork and then you squeeze the sides together and slip it into the back of the fork and it clips in. then when you push the fork on to the pivot ball the clip pops over the ball and holds the fork in place.
the other one is a sort of U shape (Again, if it is like the earlier ones) which slips over the release bearing holder, the ends clip over the ends of the clutch fork and hold the bearing holder against the end of the fork.
the first one keeps the fork from moving on the ball, the second is more or less an anti rattle device.