This swap comes up so often, and this is an important part of it obviously, but no one has covered it in a while.
Here's the FSM snippet, so everyone knows what you're talking about. Anyway, it shows the same banjo bolts as the rest of the water fittings. M12x1.25, or M12x1.50? Forgot the pitch.
Edit: about the lines, I believe most turbo line kits are -8 AN lines. Fittings depend on what they're going into, obviously. If you're ordering lines, just tell them you have the S14 water neck, and they'll include the correct fitting (instead of the hose clamp fitting for running around the back of the motor).