Front wheel- lining up the axle to allow access to damper adjustment - Have a look at the right hand side (sitting on bike) and also your handbook - Happy xmas
3rd and 4th post ...... Or number 11 and 22 in menu speak! Don't lose your noodle over this mmb! Otherwise you'll get yourself in a right spring roll.
As others have stated it is for axle alignment. It's a bit cheap and cheerful and can be quite a slack fit, so make sure that a decent screwdriver will fit up the fork leg to adjust the suspension before you bolt up the bottom pinch bolts on the legs.