Simply plop down, set the items you want them to import/export and the wiring will handle the rest. You should also change the station name to be whatever item it's handling like [item=passive-provider-chest][item=iron-ore] for stations supplying Iron or[item=requester-chest][item=iron-plate] for stations requesting Iron plates. If you want to be able to at a glance see what stations are doing what, hook up the red/green wiring to your rail network and it'll display the amount of trains