The Rectify Series drop-in speaker system for sound-ready/equipped Walthers Mainline F40PH locomotives uses the AHGS-SDPT in the rear location. The speaker mounts with double-sided mounting-tape in the stock location and no modifications are needed to replace the factory speaker.
 
You have the option of adding the RAPO-E8XF front-mount speaker should you so desire.
 
If you need a 2-pin speaker wire harness, these use the "small" size: https://www.scalesoundsystems.com/product-page/factory-pcb-speaker-harness-small
 
The speakers come fully assembled and tested.