Hi
That's the wrong type for the Peco wagons. You really want 1015 or 1016 or 1025 and you need to cut off the existing coupling. The 1128/9 are perfect for the stock with the older Rapido pocket.
Microtrains sadly don't do a coupling to fit the NEM socket, there was talk a year a two ago of them looking at this but now Dapol and Bachmann are producing couplings this may not happen.
Cheers
Paul