HOW TO INSTALL BLIND (Continued) Inside Window Frame Or On Ceiling: When installing inside the window opening, it requires a 1-12" deep recess. Pencil mark the mounting screw holes at the back or top-of the bracket. + P re-diill holes for mounting SOLOISTS, \ , On Selling Attach the brackets with the: mounting screws provided and tighten the screws in'place. » For wider widths: and added > support, install the center support! bracket when provided.