Hi oldfudger
The coolant tank is in front of the battery to the right of the radiator. If you look behind the tank you will see a min mark and max mark . I would personally top in between both marks and wait till engine heats up all liquid will rise a little.
Be careful when taking coolant cap off when engine hot best to let engine coolant down. In the haynes manual it recommends also to try get the same colour coolant
Hope ive helped in some way : )
