tensorflow – Need help with GPU installation – Ubuntu 20.04, GT 740M

I have Ubuntu 20.04 in my laptop and, and the graphic card GT 740M – I know, is a bit old.

I need to install a CUDA version that works with GT 740M, and Nvidia said here that should use CUDA 6.0. But in CUDA download page here I see that there is not a download for my distribution Ubuntu 20.04 (can see for 13.04).

What should I do? Afraid to force this CUDA 6.0 version in ubuntu 20.04…
Is there another CUDA that work for my graphic card in ubuntu 20.04?

Thank you.