Possible:

Get to Subpen w/
Clutter

Change Identity

Find Excuse for
Errand

Impossible:

Destroy Electrical
Panel
                      

                   Mission 1: Lundkwist Base

                  Jump over the boxes and go into the shack on your
                  left. Kill the guard and change your identity. Get the
                  excuse on the desk. Go to the electric panel near the
                  guard house and make sure there isn't a guard inside.
                  Shoot at it, then go to the truck. Hand the driver the
                  excuse and talk to Clutter from behind the truck. Hop
                  in and you're done.