1. Before installing the light bar and brackets, disconnect the positive battery connection.

2. Open the doors, and pull back the weather stripping above the windshield line on both sides. See Photo 1.ORBC-MB1-photo6

14. Reapply the factory rubber door seal securely in the track.

15. Complete wiring of light bar, and connect positive lead back to the battery post.

More information from http://old.auxbeam.net/blog/70018961?keyword=50%20curved