dome light wiring quistion

[krazy_texan]

first off i am trying to figure out how to attach the plunger switch to the wiring harness and where it attaches to, the second thing is i am wanting to put a switch on each side of the truck so the light comes on when you open either door. the harness i have does have the standard orang and white wires that run from the fuse block to the light and then i have this little extension that has the orange wire going straight across and then has 2 white wires coming out of each plug are these the wires that the switch is suppposed to plug into and if so i am guessing one is for each side of the truck, i am just wanting a confirmation on my thoughts