I have a prong rest on my bow (which I think I'd like to change) and I put the odd color vane down to pass between the prongs. I never heard of it either. I assume "towards the archer" means pointing to the left on a right-handed bow and to the right on the left-handed bow.
ORIGINAL: bigbulls
A prong rest like a TM hunter the odd vane goes down through the prongs