Have Aqualisa changed their pump design for the Aquastream?

We've got a 97-03 Aquastream and the pump's had it. We bought a new one from a local supplier.

Although the new one has the right title (Aquastream Mark2) and exploded diagram on the sheet of paper that came with it, the pump design seems different, to the extent that the electrical connectors at the top are different

This is the old one, still in situ where you can see there is one wire on the left and two on the right, front & back
http://www.choddo.co.uk/images/IMG_3035.jpg

and this is the new one
http://www.choddo.co.uk/images/IMG_3032.jpg

So does anyone know if this is a valid replacement pump & how do I handle the wiring change?

Thanks