Two gas props connect an inside surface of {HEAD ~ the door} to the opposing sides of {TAIL ~ the rear opening} 
Two gas props connect an inside surface of { HEAD ~ the door } to the opposing sides of { TAIL ~ the rear opening }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL