If you have a point to attach it, you can put the throttle return springs on the large diameter hole (where your thumb is in the pictures), and have it pull forward on the throttle. The upper arm is a little longer, so you get more leverage to pull the throttle back. My truck had a lifting eye on the front corner of the intake manifold, and I used that to hook up the spring, but you can also buy an L bracket and mount it there on the manifold bolt.
Bruce