Amplifier wire clips are usually secured to a circuit board by soldering or gluing. Soldering is the process of fusing metal contact surfaces together using heat and solder. Soldering can be used to secure an amplifier cable clamp to a circuit board to ensure that it is held firmly in place. Bonding is the process of using an adhesive to stick two materials together. Some amplifier cable clips may use adhesives to secure them to the circuit board, but this is not very common.
In general, amplifier clips are usually soldered to the board, but adhesives may also be used. It depends on how the amplifier cable clamp is designed and manufactured.