Feeding water to refer/freezer/icemaker

Sooner or later the questions are going to have to fizzle out!!!! :)

Set up in driveway......2017 36CKTS...... do NOT have water hose hooked up to refer. I need to do that and run some water through ice maker.

BUT.....I can NOT find the supply valve (surely there is one) to feed water to refer/freezer. Emailed salesman and he said:

Yes go out under the unit and its along the frame. It is a white and blue piece of plastic and the white tip should be pulled out to let the water go through the lines.

There is a 'skid plate' all along the underbelly from steps to front.....and I've crawled all under it and can't find anything remotely similar to what he's saying.

Any ideas where it is??????

Thanks.