No power from relays

[BaconRanch]

The relays only close a contact (dry contact), they do not provide power by themselves. You're supposed to connect one of the two blue wires to a power source, and when you close the relay you will get power on the other one.

I understand, thank you for your help.  Is there anywhere I can input power to for all 16, or do all 16 need seperate power input?  I think its the latter which is not great tbh but whatever