First Act makes several high-quality beginner's guitars that feature string-through-body construction, which adds sustain to the notes and makes for a strong anchoring point for the string itself. By pushing a string through the hole on the backside, you can successfully add that sustain to your playing on a First Act electric guitar.
Remove the low-E string from its package and unravel. Some string companies put all of the strings in the same package, while others have individual strings in envelopes. There are string companies that use different color ball ends to identify a string's gauge as well. Make sure to unravel the string slowly because the string is under some pressure and can injure you if you are not careful.
Flip the guitar over and locate the six holes on the backside of the body. You must insert the low-E string in the hole that corresponds to its spot on the guitar. A string-through-body configuration adds sustain, but you must have strings long enough to go from the underside of the body to the tuning pegs with ample string length to wrap around the peg a few times.
Flip the guitar back over and pull the string all the way through until the ball end catches on the inside of the string-through-body hole. This is where the string will anchor itself. First Act offers string-through-body capabilities on most of its single-piece-bridge electric guitars.
Place the bridge end of the string on its saddle and pass the string through the low-E tuning post. This will be the on the tuning peg closest to you if the guitar is on your lap with the head stock to your left.
Turn the tuning peg clockwise to tighten the string. Make sure that the extra string winds around the tuning peg several times below the hole. This will result in the correct amount of downward pressure on the string and prevent it from coming loose.
Clip the extra string sticking out of the tuning peg because you want no more than three or four wraps around the tuning peg.
Repeat steps 1 through 6 for the other five strings and make sure they are in their right spots. A standard-tuned guitar has an E, A, D, G, B, and high-E strings.