A transport handle is attached to {HEAD ~ the uppermost case} to facilitate {TAIL ~ mobility} of the assembly 
to facilitate
A transport handle is attached to { HEAD ~ the uppermost case } to facilitate { TAIL ~ mobility } of the assembly
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH