Two Mega Menus on one page

Dear Support Team,

Beside having a mega menu top navigation I would like to have 1. one more in the content area (module position) for the homepage only.
2. One Tab of the menu should be open by default (onLoad), but useable as intended (Disapear when I hover over other items.)

Please have a look at the Infineon website.
In the content area they have also a navigation.

I found a dropdown at the settings where I assumingly can select different Navigations. At the moment "Main Menu" is predefined. See attachment.
I would like to administrate the content mega menu like I did it for the top-navigation.

Thanks for the help!!!
Sep