The FAQ says you should use the correct cable to make sure the shock mounting works. But seeing as its not in your car yet, a generic cable will probably work fine for your builder image, putting some music on and playing around while you wait for the Eutronix one to turn up.

Be careful with the IDE header on the motherboard as its fragile and as yours is 'fresh out of the box' it hasn't been fixed by anyone to make it a little more robust.