Map ORM model to foreign database table - php

Question

This is a follow-up question to this one.
In my Typo3 plugin I have a model:
<?php
namespace Homeinfo\SysMon2\Domain\Model;
use TYPO3\CMS\Extbase\DomainObject\AbstractEntity;
class CheckResults extends AbstractEntity
{
/**
* #var int $id
*/
public $id;
/**
* #var DateTime $timestamp
*/
public $timestamp;
/**
* #var int $system
*/
public $system;
/**
* #var bool $icmp_request
*/
public $icmp_request;
/**
* #var string $ssh_login
*/
public $ssh_login ;
/**
* #var string $http_request
*/
public $http_request;
/**
* #var string $application_state
*/
public $application_state;
/**
* #var string $smart_check
*/
public $smart_check;
/**
* #var string $baytrail_freeze
*/
public $baytrail_freeze;
/**
* #var string $fsck_repair
*/
public $fsck_repair;
/**
* #var bool $application_version
*/
public $application_version;
/**
* #var int $ram_total
*/
public $ram_total;
/**
* #var int $ram_free
*/
public $ram_free;
/**
* #var int $ram_available
*/
public $ram_available;
/**
* #var string $efi_mount_ok
*/
public $efi_mount_ok;
/**
* #var int $download
*/
public $download;
/**
* #var int $upload
*/
public $upload;
/**
* #var string $root_not_ro
*/
public $root_not_ro;
/**
* #var string $sensors
*/
public $sensors;
/**
* #var bool $in_sync
*/
public $in_sync;
/**
* #var int $recent_touch_events
*/
public $recent_touch_events;
/**
* #var DateTime $offline_since
*/
public $offline_since;
/**
* #var DateTime $blackscreen_since
*/
public $blackscreen_since;
}
Which represents a table of a foreign database.
I configured that database via:
'Default' => [
...
],
'Sysmon' => [
'charset' => 'utf8mb4',
'dbname' => 'sysmon',
'driver' => 'mysqli',
'host' => 'REDACTED',
'password' => 'REDACTED',
'port' => 3306,
'tableoptions' => [
'charset' => 'utf8mb4',
'collate' => 'utf8mb4_general_ci',
],
'user' => 'sysmon_ro',
],
],
'TableMapping' => [
'checkresults' => 'Sysmon',
'offlinehistory' => 'Sysmon',
],
How do I let Typo3 know, that the 'checkresults' => 'Sysmon' mapping should use the aforementioned model class?
The official documentation does not mention how to do this.