The installation manual in effect in 2013 when I did my engine stated;

1. push white block out (towards the face which mates with the engine side connector) . It will go a short distance and stop.

2. set all pins with crimped wires into proper numbered slots.

3.Hold all pins from backing out and push white block back in. Test that they are all locked in.

The revised manual now in effect (rev 3 Nov 2015) has the following instructions:

1. press in white block and hold with point of needle nose pliers.

2. push pin with crimped wire into proper position until it locks into place. continue with remaining pins.

The new instructions sound easier to do. If you look at the wire side of the connector you will see a grove. orientate the pin so that the proper side of the pin mates with the grove. Other wise it will not lock in place properly and may not be removable. That's when you get to buy a new connector. I speak from experience.