Trying to make a Cannon

Hi guys i got some problems creating a Cannon!

I got the A Cannon (v1.0.0) from the Community content and ill try to transform it to a real one.

my question is how can i do that? tried everything but without success !!

i also want the Cannon be placed on a Position without picking it up and shoot it like a Turret..

would Appreciate if i can get some help cant find any tutorials.