Hello,
To set the menu for the mobile side menu you need to Go to Appearance >> Menus >> Edit Menu that you want to use as mobile side menu >> Scroll down and set it as mobile side menu.
Screenshot for Clarification: https://ibb.co/S52hP0p
To swap the menu places Please Go to Woodmart >> Header Builder >> Edit Header >> Mobile header on the right top and enable the option to Swap menus.
Screenshot for Clarification: https://gyazo.com/b37096aaa904c5bd0f10af02600b98f8
Best Regards