Question about specifying extra docker run options

[Ncage1974]

Hopefully this is the correct place to ask these questions. Just a really quick question to specify extra docker run options in a template. For example i'm using watchtower and want to specify the extra --cleanup option. This is how i'm doing it:

Am i doing this right do i need to specify the -- also or should i just enter cleanup without the extra --.

thanks.....