You need to deploy via script as the .mpkg will also have the .sh file with the connection details

#!/bin/bash

mkdir /tmp/ltagent
cd /tmp/ltagent
curl -sS https://server.domain.com.au/LabTech/Deployment.aspx?InstallerToken=XXXXXXXXXXXX > ltagent.zip
unzip ltagent.zip
sudo installer -pkg LTSvc.mpkg -target /
sleep 20
rm *
cd .
rmdir /tmp/ltagent