vette69

I am replacing the ball joints in my car. When I went to install the lowers, there are 2 bolts that replace the rivets. The problem is, one of the bolts has like a button (azbout a 3/8" cylinder" on the head, the other just has a regular bolt head.
Which bolt is supposed to go in front and which in the rear of the control arm?

TIA

GWilliam

The one with the 'button head' goes at the front of the lower control arm
Caliper mount will contact it at full lock.

vette69

Thanks much! :)