I use this hooks for placing/locking the anchor „rope“ - to relieve the windlass.
The first loop is on the big towing cleat, the other end (with a thimble + shackle) on the chain - going over the rubber wheel.
If you do not use one of the hooks, the rope will shave on the genua foot - not for long ;-).
I do not know if this is the „Henry Amel“ purpose of this hooks, but for me it makes sense and works well.
A54-119 Lady Charlyette - still in Porto Santo (I will give you a feedback for your mural painting at the end of the week.)