They are needed only when the wings are folded.
Install the forked end on the little tab on the strut to spar bracket first. Then install the bolt through the bracket and open tube through the fuselage in front of the vertical fin. I had to bend them slightly to make them fit.
Before you tighten nut on the bolt check to see if you need some washers between the bracket and fuselage to take up any space. Don't want to tweek the root end of the rear spar at the attachment lug. I have 4 washers on each side.
In the photo this is the right wing folded with the wing tip to the left.