This is the sort of cable you need to connect the laptop to the car.
It comes bundled with a pirated copy of Techstream and whether you use that or not is down to your own conscience and principles. The correct way of doing it would be to download a legit copy of Techstream from Lexus and then pay for a block of time to use it, but whichever way you go, you'll need that cable anyway.
Get legit Techstream and licence key here https://www.lexus-tech.eu/DiagnosticTools/Setup
Herbie's post in USB data and charging sockets was marked as the answer