Connect Kawai MP10 piano to computer Audio Interface?

I want to connect my Kawai MP10 to the Focusrite 56, which is a FireWire Digital Audio Interface connected to Macbook Pro computer. This will allow mixing/routing different audio sources, such as the piano, microphones, etc.

The MP10 provides varios types of output connectors:
– MIDI out/thru/in
– XLR out (L and R, volume fader doesn’t affect these outputs)
– 1/4″ out (L and R) phone jacks.

The Focusrite 56 has MIDI, XLR and phone input connectors.

What connector to use to connect MP10 to Focusrite 56?

Regards
Evgeny