"im confused about where to put the stick,..."
I'll take the high road today. LOL.
Like Justin I use a rope and pulley and pull from the center. I tiller the bottom limb stiffer. When I reach full draw I draw in front of a mirror or in front of an open window at night. My neighbors already think I'm daft anyway. Not that going out at 12 AM to shoot in the driveway has anything to do with it. God bless them. They are understanding people.
I also check tiller with my digi. The ancients had other bowyers around to help assess tiller. I really don't.
I tried asking my wife to help but when I told her to watch as I drew and look to see if the bottom limb was slightly stiffer. All I got was blank looks This is a highly intelligent lady. She had 2 B+'s in college. The rest where A's. Assessing tiller is not an easy thing for a non bowyer to do. So using a digi is like having another bowyer around. Me. LOL.
I aim for the bottom limb to be about 1/4 inch stiffer than the top.
Then when I go out and shoot it I can tell immediately if the limbs are bending evenly by feeling the handle pressure and the tippiness of the bow.
Jawge