Computer/display above the head unit

Can somene wifes k12 had a small compartment above the head unit. I bought a clock/computer display and fitted it. Wifes micra had a small connector but does not fit the computer connection. Is there more than one type of connector?, would it just not fit and have the connector?. Any help or advice is welcomed. Wifes micra is a 65 plate, the guy that sold the unit said it will fit any k12 from 05 to 10 plate. Any advice is welcomed.