Bed bolts: Where?

[Tod59]

Hey guys,
Working on the bed of my 59 short fleetside, replacing all the wood and new polished stainless strips. I ordered a new stainless bolt kit, all carriage bolts are there but my question regards the 1/4-20 and 5/16- carriage bolts, there are a lot of them but......I'm not sure which holes take the 1/4-20 and which holes take the larger size?

I tore all the old bolts out thinking the new kit would have detailed instructions as to where each size would go. Lesson learned on my part. No instructions included.

Anyone have a diagram where the different sizes go? I know the six long 3/8 bolts go through the wood and frame.
Thanks
Tod