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