BQ40Z50: How to set LED configuration in BQ40Z50 when using 4 LED

Hi there，

When I use bq40z50 LED display，I connect the 1~4 LED as guider's guidebook.  And the 5th LED was removed from our design.

And I config the CHG Thresh 1 ：0 

                          CHG Thresh 2:  30

                          CHG Thresh 3 ：60

                          CHG Thresh 4： 80

Question is： How to config CHG Thresh 5 if I remove the led 5？

                         If  I use 4 LED to display，there is any changed except removing LED 5？