I don't know how to jump the battery
in the engine bay the red cap+ and the ground - hook
Sorry, if you have to ask I wouldn't recommend you try it. If the terminals are connected backwards you will cause damage to the electrical system.
On the passenger side of the engine compartment there is a RED cap The + or positive side of a charger goes to that The - or ground can go to most solid metal...on mine I use the heavy casting to the right of the RED terminal. It is true that if you reverse the polarity you can damage things, but the other option you have is call a tow truck, and it is not rocket science and you need to learn sometime.
Get a friend to show you.
Looking for a Used Lucerne in your area?
CarGurus has 3,076 nationwide Lucerne listings starting at $2,400.
Search Buick Lucerne Questions
Are you a UK consumer? CarGurus now has a discussion forum in the UK.
Buick Lucerne Experts