Parking in/around Lenton

I normally take the train from Sheffield to Nottingham and then get the bus, but today I think I am going to drive down in order to see some of my friends. I was just wondering if anyone can think or knows of any secure parking (or a safe place in which I can park my car overnight) when I do travel later? Preferably around Lenton/Sainsbury's Local/The Savoy.

Any help would be appreciated as I don't really know the area all that well. Thanks