Winterize 2021 FR3 34ds

[seattlepaul1975]

Hello everyone!
We are not done for the year yet but we will be getting a cold snap and well I have to winterize before that hits. Sadly our storage is covered, but no power.

I have been searching and reading here and have questions. There is so much information I am trying to figure out the right path. Also considering that it is a 2 night cold snap then back to mid-40s and also going out next weekend in it. So trying to make it easy to re-use in a week and also not freeze pipes before then.

So the questions:
-Do I really have an anti-freeze fill hose in the low point drain area? if so, can I get a pic from someone?
-is it easier to do a blow out with air then suck in antifreeze thru the city fill with the fill hose in a bucket of anti-freeze?
-On-demand hot water heater from what I see is good as is from all I have read, disagree?
-Any gotcha in winterizing the splenda washer/dryer combo?

Thanks all this forum has been a fantastic wealth of information!