Battery Clamps???

I think I am going to use one for a power wire...Can anyone tell me how they work? I have an Optima battery & want to run one of these on the positive top post.
Is it "hot" as soon as you hook it to the + terminal?
They have 2 allen type screw for attaching the cables...Do you use eyelets to hook the cable in?
I am clueless!!!
are the optima's only top post? if so i guess this is a good way of doing it. as far as connecting it, you just put the bare wire into the hole and tighten with the allen screw. if it has side posts like regular gm batteries, then i recommend just using a gm adapter. they just screw into the side of it like the stock iron bolts but have another screw on top you can screw the O-connector onto. thats what i used and it works great.
are the optima's only top post? if so i guess this is a good way of doing it. as far as connecting it, you just put the bare wire into the hole and tighten with the allen screw. if it has side posts like regular gm batteries, then i recommend just using a gm adapter. they just screw into the side of it like the stock iron bolts but have another screw on top you can screw the O-connector onto. thats what i used and it works great.
The Optimas have top & side posts. I just didn't want to add wiring to where the cables connect on the side of the battery...Maybe I will track down a gm side post adapter.
like this?

