FIG 6 shows a typical installation detail for second configuration signal device assembly 20 near {HEAD ~ the rear end} of {TAIL ~ mailbox} 10 
of
FIG 6 shows a typical installation detail for second configuration signal device assembly 20 near { HEAD ~ the rear end } of { TAIL ~ mailbox } 10
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL OTH