Pulling Stock Sub Box

[The SHO]

What is the hardware holding the box on the side closest to the rear seats? Are all 4 nuts the same size?

Also, any ideas on a more effective way for me to get the box out besides contorting my 6 foot 3 body into the trunk?

 

[NiNeTy Fo SHO]

There are 4 nuts all the same size. They are recessed into the box, so an extension is needed. Unless you want to remove your backseat and contort yourself in there, the trunk is the way I did it. (6"4" here)