Both my current and previous cars had specific +tive and -tive charging/jump start terminals under the bonnet; but then they both had the battery hidden away in the depths of the boot.
I hear moans about non serviceable battery access from a classic car owner... they were flabbergasted that they could not change the battery themselves on a Mercedes.
That earth point on yours will be the text book one to use where it goes onto the chassis. Years gone by I'd just put them on the battery terminals. Positive first, then negative.. whatever the manual says. But with the level of electronics in cars now I tend to think best to avoid where possible.
I've got stop start neutralised so all the restarts don't tax the battery. You can't neutralise the stop start on recent models via
coding. Having the memory to turn it manually off is tricky and can be quite dangerous on an automatic when the engine is off and you expect it to be on, on roundabout get aways. People do steering wheel tricks to keep the engine running. All a bit bizarre.
The hybrid people have to ensure that they have the petrol engine running enough to keep the 12v battery charged....