I seem to recall that the battery slides in sideways and the -ve terminal is at the far end. So, to get to both terminals, you'd need to slide the battery out as well.
To jump start you could connect to the +ve lead to the battery and connect the -ve jump lead to a bare metal part on the bike frame/engine block, but not always recommended.
That's mostly correct except the battery doesn't move much without undoing the terminal screws. You don't want to undo either lead to
jump start the bike.
Last time I jump started my bike, I was alone at a remote campground with no one to help me.
I did have my jump pack with me and got to use it for the first time but it was difficult.
I managed to get the +ve jumper clip to touch the terminal while pushing the start button with my right thumb.
(The alligator style clip could not be used to hold onto the terminal due to the lack of room in the area and holding it by hand was the only way possible.)
This is a certifiable 'yoga' move and if your arms are short, almost impossible to accomplish.
I have since put a heavy duty 'pig tail' jumper lead to make it easier but had no battery issues since.