app-api/app/Models/ZBS/InteUser.php

<?php
namespace App\Models\ZBS;

use App\Models\User;
use Illuminate\Database\Eloquent\Model;

class InteUser extends Model{
    protected $connection='mysql_zb';
    protected $table='inte_user';

    public function user(){
        return $this->hasOne(User::class,'id','user_id');
    }
}