Where should I place the photo on the cover page?

Whether you place the photo on the left, right or centre of the page is a matter of layout. However, you should always look ‘into’ the page, never out of it! So if you’re looking slightly to the right in the photo, it belongs on the left-hand side. And vice versa. Ideally, the photo should also match the colour scheme of the cover page and, by extension, your documents.