adding underdash powerblock...switched and un-switched

Anyone have a good diagram that lays out how to wire up an accessory powerblock?
I'm adding guages and misc. that I'll need switched and un-switched and I can of need one of those basic diagrams to spell out source power hookup or how to on switched power.
This all would happen under the dash.
Thanks!

Try this website. It may be helpful .
Hot Rod Wiring and How to Do It