Dell Instructions for CMOS Reset Using Jumper

About the instructions at https://www.dell.com/support/kbdoc/en-us/000124377/how-to-perform-a-bios-or-cmos-reset-and-clear-the-nvram-on-dell-systems

I have two questions:

1. There is no instruction to remove the coin battery before Step "8. Plug the power cable to the computer and wait for 10 seconds for the CMOS to clear." Isn't Step 8. meaningless with the coin battery still installed?

2. There is no warning to not power on the computer during the CMOS reset.   (Please see https://www.biosflash.com/e/bios-cmos-reset.htm )

Any expertise on the above will be highly appreciated. Thanks!