No need to drill holes in your Predator!
Older version. No Slots! See top view photo.
Just use the Old Town Predator Accessory Plate Kit. Drill the plates, not the hull, and then screw the plates onto any of the 6 possible locations on the gunwales of your Predator.
You can swap and move the plates around to suit your needs. The Accessory Plate Kit can be used as replacement parts if needed. See Example Photo with Rod Holders.
Mount rod holders, fish finders, camera stands, cup holder, paddle clips, any of your favorite brands, such as Scotty. The current version of the 01.1332.0022 kit comes with: two mounting plates, hardware and instructions.