I've been there 3 times and always to the same spot-- tell them to meet you at the tender port at the tourist village. That's the only one I know of that they tender passengers to unless it's a small group that's on a private excursion.
There is only ONE wharf for cruise ship tendering. It's neither of the ones you named. Old Town has the water taxis to the Cayes and the Radisson is for pleasure boats. There actually were plans for another, but nothing much has been done with it as yet. BTW--Access is limited into the tourist area so you'll need to meet at the exit. They can't miss it, it's the only one.