If you're referring to the rear crossmember there are two buttons mounted to the cross member only and two body mounts that are bolted through the body.
The illustration shows 4 mounts on each outside rail structural bracket for a total of 8 mount assemblies. It's all on there but it is the 1942 thru 48 set up. The 1941 is similar but it was all a one year only set up due to some size differences.