Connecting moog slim phatty with usb keyboard via Logic

Hello. I've just got moog slim phatty. but i dont have a midi keyboard with midi out to connect it to phatty. I have only usb keyboard m-audio oxygen. I've read that i can link them with DAW. So i have opened Logic and phatty and oxygen connected to macbook via usb. So could anyone tell how to make slim phatty receive signals from oxygen?

Thanks