Rackspace Mail Api Server Module - Where to Store the Hook for Admin Functions?

[craigedmonds]

I have made a server module which connects to the rackspace mail api and all its files are stored within /whmcs/modules/servers/rackspace/.

 

This is so the users can add/modify/delete their email accounts etc.

 

I now need to make a hook so that when I am in the admin area editing the rackspace product, for example, increasing the mailboxes limit, I need to trigger a hook which executes some code stored within the server module in order to connect to the rackspace api.

 

Where do I store the hook file?