e-drums question

I'm new to Stagediver and I might be missing how do this... When I add an e-drum kit to the stage, it shows up in the input list with only two channels (Left/Right). But only the most basic e-drums are limited that way. Most pro kits (that you'd need a stage plot for) have multiple channels. Mine has 4 (kick, snare, left, right). Is there a way to add input channels to an e-kit in Stagediver? I can add generic inputs and label them, but then they aren't clearly part of/connected to that instrument.