What is the best way to secure a sub box where my 3rd row seats were? I'm thinking of somehow attaching it to the mounting points for the 3rd row seats themselves. Currently what I'm thinking is finding something (maybe PVC pipe) that would slide under the mounting point and attaching a 2x6 to it and then screwing the box to the 2x6. only drawback that i see is being able to get something to fit under that little bar the seat attaches to. Any other ideas or pic?