Start-up Problem

[bjrscj]

I got a multimeter and checked the voltage on the battery. The battery, after sitting for five or six days in cold weather, was sitting around 11.8 volts. Unfortunately, it was too dark and cold to check the relay connection. A few questions though. It tells me to apply 12 volts to the terminals, but how do I do that with a multimeter? Also, I see four slots for wires on the relay connection, but I only see three wires coming out. Is that normal?