Simpson R3 - Manual (Page 5)

5
The shoulders of the restraint should sit under the shoulder belts between the seat back and the oc-
cupant.
The shoulder belts of the car should be mounted at 0 to 10 degrees down** from the top of the
shoulder.
**If the shoulder belts are mounted lower than this, the occupant will be pulled forward when the
shoulder belts are tightened.
The shoulder belts should be mounted as close to the occupant as possible, separated by 2-3
inches at the mount.
The correct restraint model, (I.E. 10 degree, 15 degree…..) is chosen by the seat angle and contour.
The restraint should “fit” the contour of the seat. The driver can quickly determine if the restraint will
fit into the car’s seat by holding it against the back of the seat lined up with the shoulder belts.
If the restraint contacts the seat at the top and bottom only, a different model may be chosen.