How can I make a ELS file for an Addon Police Car?

I made the police cars addon since they were replace, now all I need to know is how to get the ELS working on both of the cars, the menu doesnt show up BTW

Did the car come with the ELS file? If so I don’t see an issue here.

No, Im trying to make a custom one

Well can’t help you there. I don’t think you are going to get much help here on the FiveM forums though.
Good luck!