0-6-0 EZ Coupler Length

[sk8board]

Hello,

I recently purchased a used 0-6-0 Santa Fe from eBay for my son's Christmas gift. This is a newer model that comes with Bachmann EZ couplers, but the rear coupler was damaged in shipping.

The Bachmann parts catalog does not list the part number of the EZ Coupler. I noticed Bachmann sells three different lengths of EZ couplers, which are: Short, Medium, and Long.

Do you know which length coupler I need to purchase?