Peco
PecoLectrics

Push-On Terminal Connectors(10) and Shrouds(5)
Walthers Part # 552-PL31, p. 276 Walthers 2012 HO Scale Reference
HO scale, $5.99, not currently in stock at Walthers, Expected: Unknown

 
Connectors slide-fit on contact pins on Peco turnout motors. Includes slide-on insulating shroud.