Hello and welcome to Just Answer!
Did you remove the blue terminal lock to install that terminal into the correct position?
The terminal lock is on the end of the connector where you can see the female terminals.
Did you install the wire into the position it shows?
Without the terminal in all the way it won't make connection and I am sure if you remove the blue lock the pump will run as long as everything else is done according to the instructions. To remove the large blue lock, you will need a sharp pick and pry it out. Once it is out you can insert the terminal in and it should lock in place. Make sure it doesn't pull out and then re-install the lock.
I hope this helps, let me know!
There are no locks, you just have to pry against the outside of the connector and kind of flick it out. You can have someone hold the connector and use two picks if you want. Sometimes if you have a sharp 90° pick you can just get under it and pull it out. It is actually very simple and I am sure you will have no problems!