How to link cubase LE 8 with Yamaha N8/12


how to connect Cubase LE 8 with YAMAHA N8 / N12 . I use a MacBook Pro that has a FireWire 800 port. I use a FireWire cable converter 600 to 800. Yamaha n8 using FireWire 600 port and my macbook using FireWire 800 port … I hope there are friends in this forum can help me .