Login to your club control panel.
Click 'Site Content' tab from the left-hand side of the page, then click 'News' from the drop-down menu.
Go to the Documents tab at the bottom of the page and select the correct document.
If the file is not listed, click on the Documents in the sub-menu on the left-hand side of the page.
Click on 'Add Document' and upload the file and fill out the fields and then 'Save'.
Go back to the news item and select the newly uploaded document in the Documents tab.