2000/2001 Sat Nav Navigation unit

I am planning to purchase a X5 that has the orignaly type (4:3) navigation unit fitted with Television etc.

Im happy enough with the unit and dont want to upgrade to the widescreen (maybe later) but despite searching the net I cant seem to find a model number for it.

Im trying to find out what inputs are on the system to allo wme to expand it. Ie add digital TV tuner for freeview, add reversing camera etc.

Does anyone know what inputs are on the unit or have photos of the rear?

Thanks.

Paul.