a hydraulic connection leading from {HEAD ~ said brake circuit} to {TAIL ~ low pressure} and high pressure accumulator systems; and 
to
a hydraulic connection leading from { HEAD ~ said brake circuit } to { TAIL ~ low pressure } and high pressure accumulator systems ; and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH