never actualy seen under the bonnet of a clio i can give no direct suggestions

But if not want to remove pipes they can be clamped to stop oil going everywhere

Can't see any probs with a power steering bottle i imagine it would only use self tappers into the body work.

Other than that wihout car in front of me i can offer no assistance

And put the fuse next to battery incase the cable chafes (you probably know anyway but one must be doubly sure)