Once you've imported the stat, you need to add it to your HUD layout - click Configure --> Configure HUD and choose your tournament profile from the drop down at the top.
Choose the group you want the stat to display in on the Groups tab and go to the Stats tab. Locate M on the left side and double click it to add it to the display (you can use the little up and down arrows to relocate it).
See the
HUD FAQ for more on configuring your HUD.