The connection can be made with the usual 16 V AC / DC model transformer

This is an MTH 20-20130-3 GP-35 Low Hood Diesel Reading Engine

Model Number: 20000379

This is a Lionel 6-25934 O SF Map & Slogan Reefer (Set of 3)

and uses the constant DCC voltage in the rails as its power supply

Model Power 87591 N B&O USRA 2-8-2 Mikado Steam Locomotive /DCC Ready VariantsUnitPrice_number_440.05 The connection can be madePRODUCT INFORMATION Diecast Metal Boiler, Cylinders & Frame Knuckle Coupler Equipped Improved Electrical Pick up, including: NEW Tender Pick ups NEW Pilot Truck Pick up NEW Improved Driver Wiper Pick ups Traction Tire Equipped for Extra Pulling Power NEW Notched Driver Axle NEW Golden White LED Lighting NEW Full DCC Compatibility Featuring Pilot Light Wiring in Tender Precision Brass Fly Wheel and Worm Gear Superior Painting and Authentic Schemes