What is the rattling I hear from under my car when the road gets slightly bumpy

I'm not sure, I bought the strut /spring assembled from o'reily and installed myself. Would the strut mounts have been on the assembly ? Or is this a part that I need to replace separately ?

Originally, I was sure that it was the shocks rattling around. Now that I've replaced the whole strut assembly and the rattle is still there, I'm convinced that I'm a moron.

don't take it so hard im sure they were old anyway.lol