As Black: Queenside

And queenside as Black — for full symmetry. The king heads to c8, the rook from the a8 corner lands on d8. Note: after queenside castling the king stands slightly closer to the centre than after kingside — so in a real game check the b- and c-files before hiding there. Here it's all clear. King e8 — onto the rook a8.

King c8, rook d8. Both sides of the board obey you now.