ok i just wanted to clarify where the swivel was, i was thinking center block but since it is the swivel block on the carriage i understand what you are saying now.

those have always been a weak point and cascade didnt make those very long before redesigning it to a bracket, bulkhead fitting and a reinforced flexible holder assy for the hoses.
i believe edwardt hit on this already
I'd call cascade and they can tell you what this is.
The conversion is simple to do and works alot better.