{HEAD ~ Switches} on the front panel are connected to {TAIL ~ like designated inputs} to PLA 31 as shown 
are connected to
{ HEAD ~ Switches } on the front panel are connected to { TAIL ~ like designated inputs } to PLA 31 as shown
HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH