Which bung do you use for a cooler upgrade?

I have the three bung version.

 

If you have a 2008-2010 transmission, then use the plug under the clutch. (This plug is not drilled or tapped on 2011 and up). This is the method for external pump coolers.

The Dodson Sump doesn't use any of the plugs since it uses an internal heat exchanger in a billet pan to control transmission temp with engine coolant.

 

I went for the bung closest to the passenger side. Thanks for the response.