Hi,
Relay Specs;
If you use your symbol for the relay, 7 and 2 are the common.
When 3 and 6 really are.
Your schematic is correct just a bit misleading.
7,2,6,3 etc, I believe are socket terminal numbers?
As I said you can get away with two relays per actuator, rather than 3.
Thanks.. Tom.. 
