Woodland Scenics JP5761 Just Plug Extension Cables (2 Cables)
To add the Extension Cable, drill a 7/16 in (11 mm) diameter hole in your layout and feed the Port end through the hole. Drill a secondary hole that is 3/8 in (9.5 mm) diameter hole and feed Plug end through the hole.About Just Plug™ Lighting System
No electrical knowledge or special tools needed, just plug and you're done! The Just Plug(TM) Lighting System is a quick and easy way to add realism and interest to new and existing layouts and other projects. Individual bulb brightness can be controlled, and the modular design allows for easy expansion. Just Plug is compatible with DCC and works for any scale.