Re-inserting the C-Clip
If you have a special C-Clip tool, this won't be hard. If you do not, then I suggest inserting the C-clip lugs first (that is, the opposite way to what is shown in the photograph) and then using the cone nut to push the rest of the C-Clip into the hub in the same way that you used it to push home the bearing cartridge. Again, don't screw the cone nut all the way home; remove it again and use a screwdriver to ensure that the C-Clip is flush against the cartridge. Once that is done, you can finally screw the cone nut back on and all the way home.
Re-inserting the C-Clip
If you have a special C-Clip tool, this won't be hard. If you do not, then I suggest inserting the C-clip lugs first (that is, the opposite way to what is shown in the photograph) and then using the cone nut to push the rest of the C-Clip into the hub in the same way that you used it to push home the bearing cartridge. Again, don't screw the cone nut all the way home; remove it again and use a screwdriver to ensure that the C-Clip is flush against the cartridge. Once that is done, you can finally screw the cone nut back on and all the way home.