Quechua Tarp XL - as an awning/markise from Decathlon

I just bought this multifunctional Tent to use it as a awning for my Ford.
It costs 80€ here and offers a lot of protected space from sun and rain. I tried with wind and was perfect.
From one side is 2,40m (the smaller side which is better to attach on the car) but is longer than the roof railings, so an extension is needed.