Deer motor attachment help

Hello,
I am new to hunting and need help setting up a motor on my feeder. My problem is that the feeder bottom is a funnel. How would I attach the motor? I was thinking of putting a metal plate that was horizontal, that way the motor would just bolt on to the flat surface. Any suggestions?

Attaching metal plate probably going to be the easiest thing to do.

And welcome to the forum lots of good people and info here.

is that an old spreader ?
if it doesn't have some kind of
weather sealed top, you'll need
something different that does.