Some of the bolts you can get from the bottom, but most from the top. I think they are 15 mil bolts. I used about three or 4 6-8" extensions so they formed a bit of an arc and I taped everything together with electrical tape including the socket so it all stays together. When you re-assemble the plate, just put some of that putty type caulking in the socket to hold the bolt so you can start it...without dropping it.
