Outer Limits 4x4 Board

hey all yeah i would like help with info on how to wire up a plug for a trailer?
im about to get a boat on monday with a trailer with a 7 pin round plug.
ive looked at the bible and did a search and many told how to wire up these plugs but none were specific to sierras.
since sierras have a strange way for headlight im wondering is it different for trailers too?

or is it as simple as splicing a wire into the blinkers, brakes and reverse?
cheers

oh i have an 89 model sierra

http://horsetrailerworld.com/Home/wiring.asp
all your answers are there.
yea the sierra tail light wiring for trailer is the same as any other car.
find splice join

For fark sake dont ever use Scotchlocks btw, will fail very quickly.