Mark two level points in the upper corners of the window molding or just outside and above the molding. Mark two level points on the edge or just outside the molding on either side of the upper edge of the bottom window frame.
Fit an electric drill with a Philips bit and secure the rod brackets to each mark. If using standard metal rods, make sure the bracket tabs are pointing up.
Thread one rod through the valance rod pocket. Place the rod in the upper brackets. If using standard metal rods, hook the top hook of the rod into the top bracket hook and press the bottom of the rod end into the bottom hook to secure the rod.
Thread the other rod through the curtain panel rod pockets and place the rod in the lower brackets. Adjust the panels and valance so the pleats are even across each section.