The side marker lights for the bed are not plugged in. Help on 2010 Chevrolet Silverado 3500 HD

All other lights work properly, there isn't a male connection from the rear power block that all of the other rear lights are plugged into.

Asked by for the 2010 Chevrolet Silverado 3500 HD
Being a 2010, your vehicle should still be under the basic 3/36 warranty. Take it to your local GM dealer and have them check the problem you describe. If in fact something wasn't 'hooked up', the new vehicle inspection should have caught that before the truck was sold.
Basic warranty has expired and the problem wasn't caught. I have found the rear power distribution block that feeds all of the rear lights. I basically need to know which plug to run from off of that block. Any info on where I can find the answer would be greatly appreciated. Thanks in advance.