Assembly: Your hardware kit includes nylon nuts/ bolts. If you are experiencing difficulty with this hardware, don't worry. They are designed this way intentionally to make it extremely difficult for these pieces to come undone during gameplay.
To tighten them, you will need both the Allen key and wrench, along with some elbow grease.
Using the wrench, immobilize the nut. Then, use the Allen key to turn the bolt into the nut, breaking through the nylon coating on the threads of the nut. Please see attached video below for a visual reference as well!