The slots are sized and spaced to receive {TAIL ~ the blades} to thereby connect {HEAD ~ the components} 
The slots are sized and spaced to receive { TAIL ~ the blades } to thereby connect { HEAD ~ the components }
OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD