There should be enough length of string for you to cut off the ball ends and rewind loops in the strings if they break. The loops are formed with a simple, even and tight twist of the wire. I used to repair broken strings this way if they broke at the saddle, and they usually did break there. I did this with two pairs of coins. One pair to hold the loop and the other pair to do the twisting. Pliers would be easier. Plain strings are the simplest. With wound strings it would be a good idea to twist the new loop before cutting off the old end. Otherwise the string windings could unravel.