GNU/Linux Kali 2019 Installing Broadcom BCM43142 Driver Guide
Hi! The linked Tutorial shows you Step-by-Step How to Install Broadcom BCM43142 Wi-fi/Bluetooth Driver in Kali GNU/Linux 2019.
The Package Provides the Source Code for the wl Kernel Modules and makes use of the DKMS Build Utility to Install them for the Running Kernel.
GNU/Linux Kali Broadcom BCM43142 Driver Installation Guide
Broadcom BCM43142 Driver Kali Linux 2019 Installation Guide