Unconventional Pivot table name. How to tell the Relation manager to use this table name ?

SQLSTATE[42S02]: Base table or view not found: 1146 Table 'mydb.chatter_customer' doesn't exist

class ChattingInstance extends Pivot {
   protected $table = 'chatting_instances';
}

class Customer extends Model {
  public function chatters(): BelongsToMany
      {
          return $this->belongsToMany(Chatter::class)
              ->withPivot('url', 'status')
              ->withTimestamps()
              ->using(ChattingInstance::class);
      }
}

class Chatter extends Model {
   public function customers(): BelongsToMany
      {
          return $this->belongsToMany(Customer::class)
              ->withPivot('url', 'status')
              ->withTimestamps()
              ->using(ChattingInstance::class);
      }
}