For Merchantshowroom.com to be able to deposit payments into your bank account from buyers' purchases, you will need to add your business bank account in your Vendor Dashboard.
You can go to the Vendor dashboard here: https://merchantshowroom.com/vendor-dashboard/
You can also go to the Payment page directly here: https://merchantshowroom.com/vendor-dashboard/settings/payment/
You can access the Payment menu item from your dashboard. The menu is located on the left side of the page. The 'Payment' menu item is in the middle of the menu.