Getting ready to put front struts in my 97 Lumina. I bought the W-body strut tool kit, and it came with the J 38844 strut alignment tool. I can't figure out what the purpose of the alignment tool is, or how to use it. The factory service manual doesn't really say anything, just to "install" it. I watched the video of the guy changing struts on a Regal, and he doesn't even use it.   Anybody know what's it's for/how to use it?   Here's the tool kit for reference: