E: unable to locate package Kali linux

Hello, world! I have faced some problems with installing wifi adapter drivers on my usb kali linux i made with winsetupfromusb and partitionwizard.
Commands i am using:
sudo apt-get update
sudo apt-get install bcmwl-kernel-source (E: unable to blablabla)
modprobe wl (fatal error (of course))

The thing is that i have updated sources.list 2 times with 2 different texts and that does absolutely nothing.
Please help me guys the one who will solve my problem will be rewarded

These are instructions i was following
Fix “Unable to locate package” error in Kali Linux.