Questions with BX1300LCD (PICS)

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Hello everyone, I have a few questions regarding the BX1300LCD unit. I was just was given a broken BX1300LCD. The problems were, the fuses were blown and the large 22uf 400v cap was popped. A really easy fix to do on such a nice unit. I have been repairing electronics for many years so I am quite comfortable and knowledgeable when working on circuit boards. I replaced the fuses and capacitor, now the BX1300LCD functions perfect! Good as New! =D Oscilloscope verified the wave form output is correct on battery. Floating potential charge for the batteries is correct as well. I have downloaded the manual and have read it thoroughly. The question I have is, what exactly are these jumpers for on the main board up near the display?

Thanks!

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