Jumper cables and fuses are the hard way to do it.
Just switch off the IMA battery with the switch under the mat in the package shelf.
You should do it at least once a year. When I got my car I was unfamiliar with it but after reading the manual I realised that was a test that needed to be done. I checked, and guess what, the starter was INOP, badly broken!! I replaced the starter immediately!
2000, 5 speed, 270,000 miles Silver
2000, 5 speed, 141,000 miles Red
"If you are not living on the edge, well then,
you are just taking up too much space."