Not sure if this is the same set up as on a 1.2 but I did it on mine (to repair the expanded rubber bung that blocked the flow of fluids).
Before you (or anyone) follows anything I say - please keep in mind that my clio is on 110000 miles and is a complete dog that cost very very little.
I undid the plastic clip on the windscreen wiper scuttle (black plastic) panel, removed the upper rubber bonnet seal and then lifted the plastic scuttle up. this gave me just enough room to get my hand in and remove the washer bottle pump (pulled it upwards) as i did this the entire bottle emptied all over the garage floor and missed the bucket I had put under the car.
Nothing broke, But I certainly wouldnt use my method if my car was worth more.
tommy.