Help me brighten up my cluster lights (pics within)

So, I've just been contortioning myself in the interior of my car to get at a few bulbs and things. I'm looking to brighten up my guage cluster lighting a bit (not being able to see my temp guage at night has caused me problems twice now) I plan to go about this by installing new (and brighter) bulbs in the cluster, and by bypassing my rheostat dimmer switch. Now, the questions and pics:

First, the rheostat. I've heard that there are 2 ways of bypassing this. You can either cut all the terminals off the wires and twist-nut them together, or, if you have a car with an extra prong on the back of the rheostat, you simply move a wire off of it's normal place and to that extra prong. As we can see in this picture, I have an extra prong:

Am I moving the red/white and gray wires, or the brown ones?

And now, the back of the cluster:

The upper hole I have marked is where the bulb I have came out. I noticed that theres another identical hole at the bottom of the cluster. Is there supposed to be a second bulb here, or was this meant for somethign else? The bulb I have fit perfectly in it, anyway. I couldn't find any other sockets on the cluster..are those the only 2?

And yes, I did just about kill my (large) self trying to get those pics help is appreciated!