Many thanks, a picture paints a thousand wordsAha - something I can help with, assuming that the geography under the petrol bonnet is similar to that under the diesel bonnet:
If you look under here (if you find the washer bottle, that will lead you to the right place):
You will find the red one - then pick a screw/ nut/ bolt to use for the black one.
(You have to remove the cap from the red one)
OoopsIt's probably because you now have electric steering. Since you have just bought the car, go back to the dealer and drive a similar car to compare.