If you get a Zed without a satnav you will almost certainly need a different cubby if its an early one. When you are looking open the cubby, if it tilts up you will need to change it to one that retracts in.
New cubbys are not cheap, over £100
Yeah after that you just wire it in and away you go, for reference a 7" screen fits perfectly onto the back the right cubby, so you can get a tablet, car pc or satnav as long as it has a 7" screen it will look nice and oem