Currently, Bolted Connection can't be used for holes created as an assembly feature.
This is problematic if we would like to add a bolt connection for Content Center Part. Standard Content Center Part cannot be edited - we cannot add holes regardless of whether you open the part and add the hole directly or edit it in the context of the assembly.
The only solution is to add the hole as an assembly feature - i.e. the hole is only visible in the assembly (does not change anything in the CC part file)
Unfortunately, this feature makes it impossible to add screws.