First of all delete these lines from panel.cfg:

Fixed Window52=45 View
Fixed Window53=90 View
Fixed Window54=180 View
Fixed Window55=225 View
Fixed Window56=270 View
Fixed Window57=315 View
Fixed Window58=Rear Right

Then delete these [Fixed windows] from 52 to 58 (in the bottom right before [VCockpit].

Then add these lines:

VIEW_REAR_LEFT_WINDOWS=12112
VIEW_REAR_LEFT_ZOOM=0.90
VIEW_REAR_LEFT_DIR=0.0,0.0,250.0
VIEW_REAR_LEFT_EYE=0.0, 2.0, 0.0

VIEW_LEFT_WINDOWS=12113
VIEW_LEFT_ZOOM=0.90
VIEW_LEFT_DIR=5.0,0.0,280.0
VIEW_LEFT_EYE=0.0, 2.0, 0.0

VIEW_RIGHT_WINDOWS=12110
VIEW_RIGHT_ZOOM=0.90
VIEW_RIGHT_DIR=0.0,0.0,90.0
VIEW_RIGHT_EYE=0.0, 2.0, 0.0

VIEW_REAR_RIGHT_WINDOWS=12115
VIEW_REAR_RIGHT_ZOOM=0.90
VIEW_REAR_RIGHT_DIR=0.0,0.0,120.0
VIEW_REAR_RIGHT_EYE=0.0, 2.0, 0.0

VIEW_REAR_WINDOWS=12111
VIEW_REAR_ZOOM=0.90
VIEW_REAR_DIR=-10.0,0.0,160.0
VIEW_REAR_EYE=0.0, 2.0, 0.0

VIEW_FORWARD_LEFT_WINDOWS=12114
VIEW_FORWARD_LEFT_ZOOM=0.90
VIEW_FORWARD_LEFT_DIR=5.0,0.0,315.0
VIEW_FORWARD_LEFT_EYE=0.0, 2.0, 0.0

VIEW_FORWARD_RIGHT_WINDOWS=12109
VIEW_FORWARD_RIGHT_ZOOM=0.90
VIEW_FORWARD_RIGHT_DIR=0.0,0.0,45.0
VIEW_FORWARD_RIGHT_EYE=0.0, 2.0, 0.0

VIEW_FORWARD_UP_ZOOM=0.65
VIEW_FORWARD_UP_DIR=-46.0,0.0,50.0
VIEW_FORWARD_UP_EYE=0.15,1.9,0

The last View Aux lines with 1207-1208 identifiers are the passenger views, so they may be left as they are.