This is how I do it every motor is self contained......
http://s1274.photobucket.com/user/edlr4/media/Impulse/002_zpsb2lpm3ud.jpg.html?sort=3&o=0
I have a similar set up only mounted to the front of the engine.This is how I do it every motor is self contained......
http://s1274.photobucket.com/user/edlr4/media/Impulse/002_zpsb2lpm3ud.jpg.html?sort=3&o=0