Scirocco Register

Hi can any 1 help me if and when i do buy a set of these Gauges for our rocco and it is just the Vdo gauges in the mount or with 1 or 2 senders how many do i need for to work 1,2,3 ie for each vdo, and does it need a relay and it will need wireing kit as well and this is to go into to dx injuection 89 8v scala mk 2 rocco is this all i will need to make it work? many thanx peeps.

is this how you would fit them--

http://homepage.ntlworld.com/john.combes2/Vdo.htm