Don't get lost: Magento Connector Install Guide > 4 - Logging & Lookup Tables > 4.0-Lookup Tables
This will enable logging which will write to [IMan Directory]/Debug/MagentoLog.txt

Lookup Tables

Lookup Tables are what IMan uses to pull data back from other sources. In this section, we’ll be covering the creation of Lookup Tables for your Magento installation in order to retrieve credit memos, invoices, and shipments for use in your ERP platform of choice.