Terrific, you want to contribute to cszb-scoreboard!
At this point, the project is small enough that there aren't a ton of rules. Please try your best to make your code looks like it belongs. We use the Google code style for C++. A commit will be auto-run via Jenkins, so it should pass tests. Likewise, code should plan to run on multiple platforms, so please don't write anything that blatantly ignores that concept. That said, if you write something which has small issues, it's better to send a pull request rather than fret about it, and clean-up can happen later.