Darned slow internet here!
I took my controller apart to look at it for you, then the pictures got loaded, I don't have that controller!
When did they change them and what's that one supposed to do? I guess I have the old style type here. I didn't know they had a new one.
The Made in China label on yours says same as mine, 09/03 it looks like from your picture.
Mine does not have a cap like that in it that I can find, though it does have a black round one on the 9v jack. Just thought I would mention it since I already took mine apart, even though it's not the same
Also I agree with the other guys about getting a better controller if that new style is same as the old ones, Just a squealer? Squeals when volts are to high or too low so you know to turn it off? Does not actauly control anything, but they make a handy power box outlet for 3,6,9,12V stuff. I've used mine allot but not for a charge controller.
I have 5 of the old style, a nice person sent me a spare, Thanks
I bought 4 or 5 Morning star controllers from Ghurd when I bought my HF panels. That's what I use for the sets connected to 12V battery banks.
I have a panel set I charge Bruce Packs with, they just wire direct to the 19.2V packs.