You can go to the plugin configuration manager, and there use the dropdown to choose if a plugin appears left/right/hidden.
You need to make sure that you are using a template that supports both sides; the default template for example supports it.
Best regards,
Garvin
# Garvin Hicking (s9y Developer)
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the plugin you need to use for this is the Sidebar HTML nugget, which, as Garvin says, can then be positioned at the left or right (if your chose theme supports 2 sidebars.