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