My new from the cathouse 01 450 doesnt have the cleat on the beam..maybe thats for the furler that you have
The two blocks I use them for a down haul of sorts for the main sail but I'm not sure of the exact routing..ending up though at the jam cleat on the starboard side of the mast
I use the eyelets on the mast for routing the halyards thru
for the main and the jib,the jib halyard doesnt get zippered into the jib..just goes up and around to the top eyelet on the jib and the btm of the haylard uses the frt jam cleat on the mast.Its pretty simple setup.The Manuals really dont show the 450 setup.
Call Mark Biggers at the Cathouse in Mich.He will help you out.