sonic boommer, you need to click "About Me" on your profile (Directly Above), then click the yellow pencil next to "XG Rank" update it to "Captain" and then Save.
Next, click "Community" on the top of the page, then click "Join A Clan" on the drop down menu. Click the bubble next to "Captains - KoG" scroll down to the bottom and click "Join Group" in the text box where it says person who promoted you put [Clan] - [Rank] - [Person Who Promoted You].
You should also visit the KoG Xiled Kings forum and make a few posts.
