The blower motor is rotated relative to the cover, and the interconnecting means are respectively interconnected with each other upon the rotation of the blower motor thereby to releasably secure {HEAD ~ the blower motor} to {TAIL ~ the cover} 
to
The blower motor is rotated relative to the cover , and the interconnecting means are respectively interconnected with each other upon the rotation of the blower motor thereby to releasably secure { HEAD ~ the blower motor } to { TAIL ~ the cover }
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 HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL