a third fastener for {TAIL ~ fastening} between said {HEAD ~ first end portion} and said roller frame assembly 
a third fastener for { TAIL ~ fastening } between said { HEAD ~ first end portion } and said roller frame assembly
OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH