struggling with connecting the wiper rod...pics!

It sounds like there are two different styles bushings....my car is a 72 dart. The linkage arm does not have a slit or a slot for the bushing to go into. The linkage arm only has the hole for bushing.

The nipple where the bushing connects to is has slit around it. I think this is where the bushing needs to "seat".

Any suggestions? Do I have the wrong parts?