One other thing I'd love to clarify, please.. In the hospital, the nurse explaining the catheter before I went home said that to use the night bag, attach it to the bottom of the leg bag.

I spent weeks watching YouTube videos (mainly American) about the day/night bags & they all disconnected the leg bag & replaced it with the night bag. Makes sense to me.
I asked my sister-in-law (nurse) in Australia & they attach the night bag to the day bag.
It all makes the tubing really long & annoying in bed.
What's the standard procedure - or do we have some weird down-under method?