need help with trailer lights/adapter plug

hey guys, i have an 03 xlt with the factory mount hitch, and it has this female plug for the lights/brakes etc for the trailer..

but my 6x10 utility trailer has just a 4 flat male plug.. so obviously i need the adapter that can make my 4 flat plug work for my trailer...

http://www.etrailer.com/dept-pg-Wiring-sf-Wiring_Adapters-hs-Plug_Only.aspx

the first one on that link, is that something that would work? or any other suggestions/places to look for the adapter?

 

[A Wise Guy]

Look under the 7 pin round plug further back on the same bracket you may find the four pin connector facing straight down. That is how my '06 is not sure if they did the same on yours.

 

[Limited02]

Look under the 7 pin round plug further back on the same bracket you may find the four pin connector facing straight down. That is how my '06 is not sure if they did the same on yours.

I just looked on mine and didn't see one

OP- I have a very similar adapter that you are looking to buy and it works great