For reasons too complicated to explain and that I don't actually understand the 'MOD' button for accessing the award section has disappeared for Game Leaders. The only way to access it is via a direct link
http://www.deadmen.co.uk/forum/modcp
This will take you to the control panel where you can add and remove badges.
Bear in mind that awarding an Admin badge may not provide access to a specific Admin forum. Some older games CS / Arma have a script that will auto add/remove access to their respective Admin forums but most modern games (Overwatch, PUBG etc) don't. Just PM me with the names of members you want either added or removed from a specific Admin forum and I'll oblige.