Strange grey tank question- 2020 355MBQS

[Ranger431]

I have a 2020 355 MBQS and have been using it frequently since buying it 2 years ago, but have never really paid attention to the 2 grey tanks. I will figure this out in a couple months when I take it out but thought maybe someone would know off the cuff.

Trying to see which grey tank service what? I’m guessing one is the bath and the other is the kitchen. Also, does anyone know which tank the washer and dryer use? Obviously we usually camp with full hookups so if just pull both open and leave them there.

Hate to even ask, but it’s a boring “waiting to camp again” day.

Thanks!

[Bookemdanno]

Bathroom & washer go to the front gray tank. Kitchen sink goes to the rear gray tank.