If I understand them correctly they pull or push from the bottom point of the rear suspension. If they push they will incur more negative camber where as if they pull they will give more positive camber.
If you are not running rear mounts with spherical bearings then the pulling and pushing will be less effective due to the fact that the top cannot pivot as easily.
I would suggest these if you are running any sort of lowering in the rear as well as a set of spherical bearing rear mounts. I would only go with the spherical rod ends not bushings. Less flex = more direct feel.
Here is a few pics from under my Lumina where you can see these same parts. There are 4 lateral link arms and two trailing arms. Our lateral link arms are adjustable to accommodate more negative camber.
Sorry for the bad pics this is all I had. The monoleaf rear spring seems to get in the way.
The first pic is the factory parts, the red ones are uprades and the third shows them installed.