New answers tagged placement
I would advise you to place it in the upper left or right corner of the page near the settings button. Try both and see how it looks. It should be positioned on the black background so it is easily spottable. Also, use "+" icon only to support visual processing and save screen space.
From your Image, I would recommend placing the Add car button with a small car icon with a + next to it below the "cars" text counter, grouping things together like this makes the user more likely to understand what it is they are doing, either that or under the Gear icon and a clear text option that says "add car" or "add my car". From the above answer I ...
My humble thoughts. Align the left side better and add a sort of '+' sign in the top right. Maybe make it subtle though so as to not distract the eye too much?
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