How to put Q2406B GSM Modem in Bootloader Mode with Bootpin

Hi is there any clear tutorial for me to activate the Bootpin in my GSM Modem so I can use DWLWIN so I can download an E2P file to my GSM.

Can someone explain in the simplest way possible so I can activate it and use DWLWIN

I have very basic knowledge with Motherboards and Circuits.

you can see this document on Section 3.16: