LeroyJenkins608

I have some old .PCK files in my despoolr.box\receive inbox folder that haven't had a date modified or accessed in over 5 years. I'm fairly positive it is safe to delete them. I'd like to know which exact packages they are for though before deleting. The naming convention of the compressed .pck files does not match up with a Package ID or anything that I can see from the SCCM console. How do you go about translating the .PCK file name to an actual package?