Using exam class I can assign points to questions, parts and subparts with
\documentclass{exam}
\begin{document}
\begin{questions}
\question[20]
\begin{parts}
\part[8]
\begin{subparts}
\subpart[3]
\end{subparts}
\end{parts}
\end{questions}
\end{document}
These points appear in the margin which is nice.
Now, I need to have more points in the margin that are not attached to a \question, \part or \subpart and that don't come with their own question/part/subpart number. So the only thing that I want to achieve is to have extra points in the margin without any other change in the text.
How can I add these points to the margin?