Alumnacraft livewell leak
If it's leaking at the overflow or where the pump empties in to the livewell, you will likely have to pull up some of the front decking to get at that. Not too hard - just remove the screws.
I'd check the connection at the pump in the transomwell first.
When you fill the livewell and turn the pump off, does it slowly drain or stay full? That will tell you where to look.
If it stays full - look at the overflow connection (on the starboard / right side of the boat). If that's broken, the livewell will stay full but anytime you run the pump excess water will drain into the boat instead of out of it. If that's not it, it could be leaking right at the pump inlet in the transom well.
If it drains slowly, it's a connection either right below the livewell or at the back in the transom well. To find out which, you will have to fill it and go in and see - you will need to remove the battery trays in the bow to get at the front connection.