You should have gotten an Armorer's half back plate and instructions on the installation of the "Ghost" connector. Those take a little time to fit properly. The easiest way I've found to remove the slide with your connector's over travel tab blocking it, is: Lock back the slide, remove the back plate, then the striker. Lower your slide, pull the trigger to the rear, and remove the slide normally.
The "Ghost Rocket Connectors" work well, but if you want something that works great and is much easier to install, try the "Ultimate Over Travel Stop" from Lone Wolf for your next project.
Savage