causing graphical information to be displayed on the display in {HEAD ~ connection} with the at least one mismatched optical part, the graphical information including information about at least one of: the necessary optical part which should be newly installed in the main equipment, and the installed optical part which should be removed from {TAIL ~ the main equipment} 
causing graphical information to be displayed on the display in { HEAD ~ connection } with the at least one mismatched optical part , the graphical information including information about at least one of : the necessary optical part which should be newly installed in the main equipment , and the installed optical part which should be removed from { TAIL ~ the main equipment }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL