You must have "Full Access" or "Limited Access - Website" permissions to edit your site.
NOTE: You will need to add the Scoreboard Ribbon first.
Sign in to your site and turn on Edit Mode.
Go to your League Page or Club Page,
Click on the yellow Admin dropdown button.
Choose Options.
Scroll down and choose Edit Page Details.
Check the box next to Show Scoreboard in the middle of the page.
Scroll down and click Save Changes.