Install/Enable/Activate plugin on multisite without access to master site

There’s an option in the wp_sitemeta table with meta_key ‘menu_items’

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this value is referred to the checkbox “Administration menu” of the page /wp-admin/network/settings.php (accessible only to siteadmins) that allows the activation of plugins on single sites.
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I’ve not tested but using the value a:1:{s:7:"plugins";s:1:"1";} and having the plugin uploaded via ftp you should see the plugin page on the site you’ve access to..

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