One of the speakers has a small hole on the side where an eyebolt was previously located.

Using these Martin Audio AQ12 loudspeakers is easy. Just connect them to your audio system properly. Make sure to place them in a stable position. When using, avoid exposing them to extreme temperatures and humidity. As for maintenance, keep them clean by gently wiping the surface with a dry cloth regularly. Check the connections from time to time to ensure they are secure. If you notice any issues, like abnormal sounds, stop using them and have them checked.