How to install new windshield washer reservoir correctly?

So I have searched and googled. I can not find work instructions on how to get the plastic hose that goes from the inside of the car from the inner firewall to screw into the washer reservoir. I have purchased a new o-ring (#11 in diagram) and want it to seal nicely.

I have tried for an hour+ and I see no way of doing it. Do I need to remove the ecu colored plugs and air tight chamber on that is on the firewall / drivers side in order to “screw and lock” this plastic tube into the reservoir?

It appears that in order for it to be installed it needs to pushed into the reservoir about 1" and twist 45Deg to lock it in place. I cant figure it out, no space to do anything lol

https://i.imgur.com/LvDetfV.png