Car Fleet GPS Tracking system -how to install MV720 so no one can find it?

(No ACC Satus Detection) www.ebay.co.uk...
(With ACC Satus Detection) www.ebay.co.uk...
GPS Relay GPS Tracker Car Shock Alarm GPS GSM Locator Tracking Device Remote Control Anti-theft Monitoring Cut Off Fuel Power ✅【Real-time Tracking】You can check the GPS tracker location anytime anywhere on google maps by mobile phone, tablet and computer, positioning accuracy up to 5 meters✅【Remotely Cut Off & Restore Fuel】You can cut off the Fuel once the car was stolen or meet some emergency, Of course, you can resume it✅【Application】 This GPS relay is the latest hidden design Relay Car GPS Tracker which is designed, Voltage 9-90V DC, especially for most vehicles on the market, such as the car, motorcycle, motorbike, and truck!✅【Multiple Protection】 Speed Alert, Displacement Alarm, Vibration Alarm & Geo-fence Alert etc provide many ways to secure your vehicle✅【Low-Cost Tracking】This vehicle GPS tracker comes with a dedicated SIM card, no need to purchase additional hardware, activate it after receiving the tracker, start tracking with any smartphone or web browser. the data plan only 3.6 GBP/month