Connections between the packages themselves, and between the packages and {HEAD ~ stack connecting pads}, are made on {TAIL ~ the faces} of the stack 
Connections between the packages themselves , and between the packages and { HEAD ~ stack connecting pads } , are made on { TAIL ~ the faces } of the stack
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH