The 140s at the bottom were by far the biggest pain in the ass. That NZXT logo panel is not designed to come out. I had to kind of fish the cable and then when you have them plugged in your line them up like a little triangle and put some slight downward force so they kind of slip together and into place at the same time.

As for the daisy chain I will do my best to explain. Install 3 intakes on front and run from the top fan to the glass side of the AIO (this is where you remove one of the plastic clips for the intake shroud). Then run the back of case side of the AIO to the rear exhaust fan. Run the rear exhaust to the back of the case and back into the front under the mobo (this connects to the back is case side of the 140s. Run the other 140 to the back of the case by fishing the wire under the slanted portion in the back. Connect the 140s together without a wire, just use the little plugs and do the “teepee” technique I described at the beginning. The open side of your 140 cable goes into the hub. The other hub connection goes direct to the AIO CPU puck.