To add new plugins or themes directly to a WordPress site:

Step 1:
Go to MalCare website and sign in using your email ID. 

Step 2: On the MalCare site listing page, select the website of your choice.


Step 3: It'll take you to the Site Detail page. In this page, go to Management section. Here you can click on + Add Plugins  or + Add Themes.

Step 4: On the next page you will see a list of plugins from the WordPress repo. 

If you selected Theme you will get the list of themes available.