Those 2 screws on the sides of the lock may be what is holding the lock in the door. To remove the panel, pop the 2 small plugs out of the grab handle ends and remove the retaining bolts. From there the panel will pop off the door, sometimes the clips can be a little stubborn, once one pops off, you can look behind the panel to se where the next one is to help pop it off with a long flat screwdriver