Next18 and E24 are the only 2 DCC connectors which will fit in N scale narrow hood diesels (Actually I'm not sure if Next18 would even fit, so it might just be E24).
Interesting that Atlas moved away from using decoder-mounted LEDs with fiber optics in the shell and instead mounted LEDs somewhere in the shell with wires and connectors to deal with. However I was not a fan of the fiber-optic lit ditch lights as they were rather dim. If in this model the LED is mounted in or close to the ditch light housing, one would hope that they are much brighter.
It also appears that they are using flex circuit board for holding the LEDs. That's a first for Atlas. It would have been even better to extend the flex circuit to create a direct flex connection to the light board in the chassis. They got it right, but only half way.
I suspect that it is due to the JST 0.8mm pitch connectors they already have on the light board. There might not be a JST connector which can be connected directly to a flex board circuit.
Here is an example of flex board.
