Do you mean the terminal under the rubber boot, Ron?
If it's looking rusty, then removing the cable and cleaning both parts will definitely improve matters BUT be very careful undoing the nut. If it is badly corroded, then there's a danger the terminal itself could turn with the nut, which can tear off the attached wires inside the starter itself. I believe there's a hex at the base of the terminal, which you can get a thin spanner on to stop it turning.
I think the most recent removal/replacement of a 696/796/1100 starter was by MrsC_772 and there's lots of useful info. in her thread.
http://www.ukmonster.co.uk/monster/s...ad.php?t=56223