Which hook to use?

[Infoman4ever]

Hi,
I added a new column to "thread" table and performed a plugin to fill it with a particular data relative to each thread and everything went well, but what I'm stacking on is Where to show this column on "showthread.php", I used this tag:

{vb:raw threadinfo.my_new_column}

I copy-pasted it manually on "showthread" template and it worked but not in where I want, I want to show it near to date of publication on the "posthead" above the first post of the thread, what I'm looking for is which hook should I use to display my data on the proper area?

Regards.