The interposer card is modified to receive a docking bay which receives {TAIL ~ a cartridge} which contains {HEAD ~ a hard disk drive} 
The interposer card is modified to receive a docking bay which receives { TAIL ~ a cartridge } which contains { HEAD ~ a hard disk drive }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD