When controlled by the CPU line 31 would actuate {TAIL ~ switches} 61 to 68 as {HEAD ~ relays} by cable 31 
When controlled by the CPU line 31 would actuate { TAIL ~ switches } 61 to 68 as { HEAD ~ relays } by cable 31
OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH