Bought Trokar swimming frog hooks today and realized at home there are no screws to front mount the frog to the front of the hooks.  I'm assuming I need to buy them to mount my plastics to them.  If so what am I looking for?

These hooks are for hollow body frogs. If youre looking to rig up a solid body horny toad type frog with a double hook,  you need something like a Ribbit Double Take hook. 

ya, you bought the wrong hooks