replacing fluorescent light ballast help needed

I have a fluorescent light fixture with 2 bulbs it has 2 separate ballasts.

I am replacing the 2 ballasts with one single one that powers 2 bulbs.

I understand the diagram on the new ballast but am confused on the wiring going to the bulb socket terminals.

I have 2 red wires that go to 1 socket then on the opposite side of the fixture and the opposite bulb I have the other 2 red wires. Those 4 red wires will go to the red wire on the ballast.

Now I have 2 white wires and a blue wire on the other socket of each bulb.

Question: I will have to connect a white wire and a blue wire to the ballasts blue wire correct? Does it matter which one? both?

I do have 2 separate blue wires on the new ballast.


What is the extra white wire on the bulb sockets?
cap it off?

I tried taking the end caps off to see but not sure how to.

The GE ballast is the new one and the Robertson ballast is one of the old ones.

Attached Images

   

replacing fluorescent light ballast help needed