Which category to submit mod to?

[AFemaleProdigy]

I want to attempt to submit my first ever modification, but am not sure which forum it should go in. It consists of template edits and code edits to a PHP file. It is not a plugin or product. Just instructions to edit code. Where should that go? Thanks!

[HMBeaty]

<a href="https://vborg.vbsupport.ru/forumdisplay.php?f=246" target="_blank">vBulletin 4.x Template Modifications</a>

[AFemaleProdigy]

thanks!