Open the display to a 90 degree angle. Rest the trackpad face down on your work surface and allow the display to hang over the edge. If possible, adjust your chair or worksurface height so the display will rest on your legs and the trackpad will lie flat on the worksurface.
Remove the four T8 Torx screws which fasten the display to the trackpad. The screw closest to the display data cable has a tapered head.