Hey John

Nice boat.. I have a kickboat and a Uboat. On my Uboat
I have a fish finder and a 3 pole holder on the left
side of my tube. I got a 3 foot PVC pipe and straped
it to my tube. I used valco strapes to hold it on. On the
PVC pipe I connected a hummingbird fishfinder on a adjustable
rod ( paint brush rod ) so you could adjust the conducter into
the water by hand. Then I connected the rod onto the PCV
piping. I them connected a 3 pole holder made by Berkley
on the PVC piping near the back. The 9 volt battery I placed
in on of the side bags. This turned out to be a very cool rig
and easy to get to my rods. Good luck.

Best Fishes
Gene :)