{TAIL ~ The backboard} has all or some of the drive connectors on a front face thereof, arranged in {HEAD ~ a matrix configuration} having a plurality of rows and a plurality of columns 
{ TAIL ~ The backboard } has all or some of the drive connectors on a front face thereof , arranged in { HEAD ~ a matrix configuration } having a plurality of rows and a plurality of columns
TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH