2013 Ram 1500 taillight Assembly

[habmariner]

I was trying to install LED bulbs into the rear tail light and my tail light assembly looks different from all those I’ve googled online. Could not see how to remove the bulb when I removed the top housing
All I could see was 4 prongs

 

[patchelect]

If it's the copper colored things the big one should slip off to allow removal. Just guessing by the picture but I'm not 100% certain.