Wiring help!?!?

Ok so i know some of you will be dissapointed in me but i picked up a brand new set of Outlaw hornblasters for CHEAP (only because i have to put some money into my audio) or i would of went bigger…
NOW to my question…
the compressor i received has the power wire for the compressor and the one for the pressure switch all in one wire so how do i wire that to the relay???
please help!!! i know #30 on realy goes the the battery…i can make the compressor come on but i need to put a switch in for the horns themselves and also to turn the compressor off… please help ive searched around ehre and kinda find anything that will help

Having a little trouble following ya.

What kind of compressor? It should have 2 wires.
What kind of pressure switch?
And it’s just a bare 4 pin relay?