a radially extending slot for {HEAD ~ engagement} with said camming pin and causing said one of {TAIL ~ said solar panels} to rotate with said pulley; and 
a radially extending slot for { HEAD ~ engagement } with said camming pin and causing said one of { TAIL ~ said solar panels } to rotate with said pulley ; and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH