Linking Reaktors's Audio Inputs with Physical Inputs on Audio Interface

I'm trying to figure out an efficient way to work with my audio inputs in Reaktor. Currently I have a physical analog synth going to input 7 on my audio interface. I would have figured that there was some way to create the input in reaktor and simply choose what input it would be linked to in my audio interface. Currently, the only way I can access input 7 is to actually create 7 inputs, 6 of which I do not need. Even if I disable the 1st six inputs of my audio interface in Reaktor's setup, they still get created, but are disabled. And when I try to clean things up, and delete the 6 other inputs that I don't need, the 7th input becomes input 1 again.

Is this behaving as normal, or am I missing something? It's far from the end of the world, and I don't want to sound like I'm complaining, but I am hoping I'm just really overlooking something simple.

Thanks in advance