func (b *BackupExecutor) attachTLSVolumeMounts() []corev1.VolumeMount {
    var tlsVolumeMounts []corev1.VolumeMount
    if b.backup.Spec.Backend != nil && !utils.ZeroLen(b.backup.Spec.Backend.VolumeMounts) {
        tlsVolumeMounts = append(tlsVolumeMounts, *b.backup.Spec.Backend.VolumeMounts...)
    }