Lol... BMS... PMS...
I can definitely say if you don't drive the car too often and also have a dashcam installed (like I do, Blackvue with magic pro hardwired) it would be best to leave the car plugged in a trickle charger over night on a weekend to keep the battery in top condition for many years.
Just ensure you connect the negative to the dedicated chassis negative point (near the LHS strut rather than straight on th negative terminal on the battery. Although I would seriously doubt you could connect it directly to the negative terminal as it sits deep in the battery plastic surrounding.
My focus battery only lasted less than 3 years. The problem started when the dash brought up the message to start the car via push button when it was in the middle of the stop start cycle at the lights.
Ford recommend a replacement battery for $450 dollars plus $75 dollars BMS reset.
I will keep charging it this way until the battery completely dies as it starts up on cold mornings quite well. Then I'll change it to a century when outside warranty