sipadu_mbip/app/Model/Module/SubHistory.php

<?php

namespace App\Model\Module;

use Jenssegers\Mongodb\Eloquent\Model as Eloquent;

class SubHistory extends Eloquent
{
    //
	protected $connection = 'mongodb';
    protected $collection = 'sub_history';

	protected $guarded = ['_id'];

	public function history(){
													  // 1: Referrer Parent, 2: Referer Current Class
        return $this->belongsToMany('App\Model\Module\History');
    }
}