You need a tee piece to fit 'em, or use one of the allen headed plugs in the oil filter housing to stick them in - senders should come with the new gauges. I'd thoroughly recommend going for electric gauges instead of cheaper mechanical ones after spreading oil on my drivers side front wheel and brake 3 times from split capiliaries[!]
Pete.
Cinq sporting 1242cc
http://mysite.freeserve.com/close_to_cracking_up/
http://autos.groups.yahoo.com/group/Cinqs_and_Seis/
http://www.clubcento.co.uk/