You will need to deploy Xporter to your schools in order to connect them to XVault. Depending on your configuration you will either need Xporter or the Xporter SIF Agent. Either can be installed where the other is already present.
If you have an existing Xporter estate then you may be able to make use of Groupcall Dashboard to facilitate your deployment.
Prior to any Xporter deployment you should consult the Groupcall Xporter First Line User Guide, available here.