Eagle,
You definately have the right connection - the ipaq 38/39/54/55/22 etc all have the same connection pin at the base of the ipaq. Unfortunately there is not a moulded car kit designed for the 5550 by tomtom so you do have to rely on the delicate connection pin. Check out this new mount we have in stock -
http://www.totalpda.co.uk/Carcomm-Po...-39-54-55.aspx
Within the next few weeks we will have adapters that will allow your tomtom receiver to be plugged into this moulded mount. This would solve the issue as your pda would sit neatly into the mount and doesn't need the delicate connector!