Telegram_Bot send_location

I have a device_tracker for my volvo car which is integrated with HA and is working fine.
I also have telegram_bot setup and working from within HA.

What I want to do is to send the location of my car to my telegram_bot when car engine starts and stops.

What I am unable to understand how to do is to set the latitude and longitude variables of the telegram_bot.send_location service as I am not v good with expressions or json commands.

The included screenshots should explain more.

Any help will be appreciated.