So I'm trying to replace my old magnetic ballast with a new instant start ballast to power 2 T12 eight foot tubes. The old ballast only had a blue wire and a red one, but the new one has 2 blue wires and one red wire. I'm trying to follow the guide image on the ballast itself (pictured) to rewire it, which indicates to run the blue wires through each socket and the red to both sockets on the other end. How can I run the red wire to 2 sockets if there is only one red wire coming out of the ballast? All I see on the socket are simply a hole to place the tube pin in and little holes above that which I assume is where the blue wires would go to power individual tubes on one end.
As you can probably tell, I'm very new to this so please dumb it down! I wouldn't normally attempt such a thing but I was told it would be a simple matter of connecting like-coloured cables to each other.