As you might know, the power switch prefab Treyarch provided us is a bit weird. They have a black hand icon (similar to the one in WaW) next to the "Turn on power" text. Here's how to remove it, making your map look more professional.
Here is what the normal text looks like:
Here is what the new text looks like:
So lets get into it! First, stamp your power switch prefab.
Next, select ONLY the trigger, and take note of this KVP (cursorhint, HINT_ACTIVATE). We will change it.