It is supposed to be any pin, any time. I’ve not worked this feature.
The Arduino code in 5.5 to set the relays is as follows:
if (pin[0]) digitalWrite(13, relayState[pin[0]-1]);
if (pin[1]) digitalWrite(5, relayState[pin[1]-1]);
if (pin[2]) digitalWrite(6, relayState[pin[2]-1]);
if (pin[3]) digitalWrite(7, relayState[pin[3]-1]);
if (pin[4]) digitalWrite(8, relayState[pin[4]-1]);
if (pin[5]) digitalWrite(9, relayState[pin[5]-1]);
if (pin[6]) digitalWrite(10, relayState[pin[6]-1]);
if (pin[7]) digitalWrite(11, relayState[pin[7]-1]);
if (pin[8]) digitalWrite(12, relayState[pin[8]-1]);
if (pin[9]) digitalWrite(4, relayState[pin[9]-1]);
I’m not 100% how all of this is mapped to the pins. Someone else may chime in with better answers.