i have the old 6 button computer which only gives time,date, and temperature outside.can i retrofit the 13 button computer that gives mpg and and average speed.can i just buy it and switch it for the one i have.does it just plug in and can it use the same place and will it fit. just wanted to know?would all i need to fit it would be the actual computer nothing else? thanks
here is a pic of the new computer i want to put on:

do i also need the on board computer module that goes with this specific type of computer? this 13 buton display will not work with my 6 button obc module. is that correct?





