storm sail on older trimarans

I have a kraken 33 trimaran from 1973. The storm sail seems unusual.

There is a chainplate inboard of the normal forestay I believe for the storm sail.

There is a halyard that exits the mast above the lowers. Is this "halyard" maybe actually just a spinnaker pole topping lift and the storm jib is raised from the mast head with a regular halyard? If not, shouldnt the halyard exit the mast at the level of the lowers rather than 6ft higher?

Either way, does it make sense to have a storm jib without hanks?

 

Does it have a wire luff? A stormsail without a stay would need one and you'd want it backed up by running backs. I'm wondering if it is more of a Spinnaker staysail?
Seems like the sailplan is on the forum somewhere and members who have the boat can pitch in.