Hi all, I am considering buying a Boss LS-2 Line Selector so I can switch between use of two guitars onstage, going into the same amp. I have read that this is totally possible with this effect, and have even seen a diagram of how to accomplish this, but the diagram is confusing. In A<->B mode, it basically shows guitar 1 going into the "Return A", guitar 2 going into "Return B", and the "Output" proceeding to the amp. The confusing part is this statement which is pointing to the LS-2 "Input". It reads: "Plug into the input jack. If there is no plug connected to the input jack, the unit will not be on." What is it I am supposed to connect here? The end of a cord with its other end attached to nothing? While I can take the statement at face value, I'm not quite sure how that would work (i.e., nothing really inputed), or if a cord with only one end attached might not add noise or RFI to the signal. Thanks for any clarification.