oxygen sensor

i have 2001 town car signature series. anybody could help me with which is bank 2 sensor 2 oxygen sensor. whether its in the rear or front left or right. even dealer couldnt tell me. if anybody knows . would be greatly appreciated.

thanks

Bank 1 (Cylinders 1-4) Left side
Bank 2 (Cylinders 5-8) Right side.
Exhaust for bank 2 will have one oxygen sensor befor and one
after the Catalytic converter.

Note: The one befor the catalytic takes the most HEAT!

MCGIVER