Included Hardware: 8x 1/4"-20 x 3/8" button head | 8x 1/4" Washer | 8x 1/4"-20 T-Nut
Begin by sliding the T-Nuts into the channel in the top of the cross bars through the milled slots. It may be helpful to lay the panel(s) out in the desired position prior to get a better idea of where the T-Nuts need to be for mounting.
If the milled slots appear that they will be in a position where a T-Nut is needed and would not allow for the panel to be secured in that location, the cross bars can be flipped over and the T-Nuts can be instead slid into the channel through the end. It is best to mount the panels using the 1/4" slots around the perimeter.
With the T-Nuts roughly in position, set the panel(s) as desired and loosely bolt them in place with the 1/4" bolts into the T-Nuts.
With everything loosely in place, finalize the position of the panel and tighten all hardware.