Hook location help

[MoMan]

I'm using a feedback system (itrader) mod which gives all users on my site a feedback score based on successful item purchases, and I would like to include this score in the postbit. However, a certain few lines of code need to be executed in order to fetch the value of the feedback variable from the database.

Which hook location would I use to insert my code, given a separate feedback score needs to be retrieved for each postbit?

The variable which my code should populate is included in my postbit_legacy template.