hobie 18 cross beam, unbolting, do you loose the nuts

When I fully remove the 4 allen bolts from the rear cross beam on my hobie 18, I assume they are held in place by some kind of a keeper, am I correct? I have a down loaded manual but it is not clear to me. I need to fully remove it to make some repairs, any other guidance?
thanks
yes there is a alum block (slug) inside your beam that has a hole tapped into it that receives the bolts. If i recall correctly the alum block is held in place by rivets.
http://hobie-18.ning.com/…commendation-for-a-loose This topic was well covered last week on the Hobie Social Network. Check it out.

Clint
http://www.hcspace.org