How do I get my Yamaha DTX700K to play onto my Logic Project

I have recently bought the iTwo as I wanted to link the drums sounds I have made in my Yamaha DTX700K module and record/sync them straight onto my Logic project.

I have the USB going straight from the back of the interface into my Mac but I was wondering where my plug my jack cables. Do they both go into my L & R Outputs on the back of the Module itself?

I have put one in just the L for now and I can hear the sound coming back into my headphones via the interface but this is not being picked up by Logic itself.

What am I doing wrong? I would be very grateful if someone could help me please with some simple instructions. I'm very new to this sort of thing.