Hi Kirsch Electric,
If you've created a custom screen, you can tell Method which tab the screen should appear under by adding a Tab Link. To do this, navigate to Customize > Tabs and locate the tab that you want the screen to appear under. Then select Edit Tab Links..., find the screen from the dropdown, give the link a name, select the Add Tab Link button and then the Finished Editing Tab Links button.
You may need to refresh your browser in order for the change to be seen. I hope this helps.
--Audisho