Help with replacing tail lights

[B_and_D]

http://www.rvsuppliesoutlet.com/artifact/2778183/

I ordered a Lumitronics LUM-STN1R Stop/Turn/Tail Light.

The new tail light only has one bulb, two filament, and besides the ground wire, a black wire and a green wire.

Problem is, we have four wires coming out of the trailer, ground, yellow (attached to single filament bulb) and black and green (attached to a separate two filament bulb).

So what am I supposed to do? Put the black and green together with the black one? And then the yellow one to the green one? Is this even going to work for us?