Follow up question to old Kenmore Refrigerator water inlet valve

[lrubin28]

Kenmore Refrigerator model 10659212990.   Water inlet valve 2206123.

I bought a replacement water inlet valve 2206123.  ...it's a triple solenoid model for a kenmore 10659212990.  The incoming water supply goes to the brass nut - easy. But that's where I get confused.  There's another solenoid (green) with a 1/4" port. I think this would go to the ice maker, and that's a 1/4" line that I can see running up the back of the fridge. So if I'm right, that knocks out 2 of the 5.

So now I have 3 open ports on the 2206123 and they all appear to be 5/16".   Coming from the fridge, there are 3 tubing lines bundled together before disappearing inside the fridge. 2 of them are 5/16" and the other is 1/4".  How do I identify which tube goes into which port of the valve?   (Unfortunately there are no documents on back of fridge or under front grate).  It's an old fridge and no one seems to have any info on it.  I'd appreciate it greatly if someone could help me out.   Do I need to take the fridge apart to see where each of the 3 lines go?  Hopefully not...thank you in advance...