At the moment , no pictures. I have told them that this is breaking 'LitterBox Law' but they are steadfast . So you'll have to take my word for it that they are lovely , and imagine them as you say "Welcome to the LitterBox" 
We have two young adult littermates, (I'll call them QC -queencat and TC-tomcat)
Neutered , jet black.
QC came in, moseyed about a while , ate ,peed in the tray and now under the sofa
TC went straight under a corner table . He is very shy and we know he'll take time to make a move .
We haven't had a feline for many years . Did a lot of online searching and checking rescues , kept coming back to this pair . They ticked the boxes .
So, they are understandably confused and eyeing us up before they make any decisions about us.
By tomorrow they should have emptied the food bowls and left us a Thank You in the litter 