Unlocking the pins on the BCM connectors
Before you start with the pins, remove the black tape that is covering the BCM wires. This will allow better access to the connector rear which will help a lot.
BCM pin release
The "all pin lock" on the BCM connectors is like a hinge. The rear section is pried out until it releases and swings back. This releases the pins on half of the connector. The pins are then individually released by using the pin tool in an identical way as the MCM and ECM connectors.