The carriage is mounted on {HEAD ~ the frame} and defines one of the engagement points by which the tensiometer is coupled to {TAIL ~ the flexible member} 
The carriage is mounted on { HEAD ~ the frame } and defines one of the engagement points by which the tensiometer is coupled to { TAIL ~ the flexible member }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL