Wiring a seperate horn.

Simple. How do i do it?
I want it to look discreet.
I have the 2 prong push button and a regular horn.
I need wiring but what gauge?
Also do i need a relay? and do i need to connect a fuse holder aswell? or what?
I dont want to run a wire directly to the battery where in the main fuse box can i wire to?
Help me
Thanks.
I want it to look discreet.
I have the 2 prong push button and a regular horn.
I need wiring but what gauge?
Also do i need a relay? and do i need to connect a fuse holder aswell? or what?
I dont want to run a wire directly to the battery where in the main fuse box can i wire to?
Help me

Thanks.
Comments
it looks like the one on my car already.
also i dont need a relay or fuse holder?
i was doing wagodizzle's rear horn set up. (:D)
sounds deeper than the original horn on the car, going to get an exact ef horn, dont like the deepness.
Thanks,
Dave
others that tailgate or have high beams and then i honk again (working on getting HID reverse lights to a switch)
mostly to warn when i back up, but i like to honk out of nowhere and people get scared or confused
thanks