It means that the input is configurable.
If you want it balanced, you must fit components B, D & E.
If you want unbalanced, you must fit components A & C.
But it's somewaht silly, because as much as I look, I can't find component B, and components D & E should be there in any case.
If you want it balanced, you must fit components B, D & E.
If you want unbalanced, you must fit components A & C.
But it's somewaht silly, because as much as I look, I can't find component B, and components D & E should be there in any case.