The main lug on the alternator is labeled "BAT." The alternator case itself is the ground, or negative. Batteries have two posts, a positive and a negative. Connect the "BAT" to the positive post, and the case to the negative post on the battery. The internal regulator will automatically shut off electricity flowing out of the alternator when the battery is fully charged. If you are uncomfortable working with electricity, any qualified electrician can do this for you. Bear in mind the size of the main power wires. The wires must be sufficiently thick enough to handle the current output of the alternator. If you are unsure how to size up wires, a qualified electrician can assist you.
You can wire an indicator light to the alternator as well. Delco alternators also have two tabs, marked 1 and 2. First, wire in the main power wires. After that, wire an indicator light to terminal number 1. An indicator light has two terminals. The other terminal of the light should be wired to the case ground. When the alternator is working, the indicator light stays off. If the alternator malfunctions, the light comes on.
You can wire in an ammeter to visually see how many amps are flowing out of the alternator. Run the power cable from the "BAT" to one of the two terminals on the ammeter. Connect the other terminal of the ammeter to the battery positive post. Some ammeters are labeled by which terminal connects to the alternator, and which terminal connects to the battery. The ammeter must be sufficiently large enough to accept the current of the alternator. If it is too small, more than likely it will burn out internally. Also, don't forget to size up the wires accordingly to the current output. A qualified electrician can assist you with ammeter and wire sizing.