Locate where you want the light and hold the mount in place. Placing the mounting holes over the mortar is best since it is easier to screw a masonry screw into the joint between the bricks instead of into the brick.
Screw a masonry screw through the mounting hole into the wall with the power screwdriver. Use a washer between the screw and the mounting plate if necessary to provide a solid mount.
Adjust the controls on the light to your preferences. Normally, solar security lights allow you to adjust the sensitivity of the motion detector and then to leave the light on from a period of 30 seconds up to 10 minutes when it detects motion. Decorative lights are often always on, but some do offer more control, with expensive ones often having a remote control so that you can turn the light on and off from a distance or even inside the home.
Place the light on the mount and adjust the solar panel in the direction of the sun. If the solar panel is on an extended cable, then uncoil it and mount it where the sun hits it directly.
Allow a full day of sunshine and then check the operations of the light to ensure that it is working as it should.
Paint the recharging cord to match the color of the bricks so that it blends in with the wall.