Getting chart data labels to be different to the label on the pivot table

Hi,

i would like to my chart part of my pivot chart to show the data row names to be more descriptive than the abbreviated data row names in the source.
attached is my data, in sheet 1, the data is in green with the corresponding pivot table.

for example on my data row of LL this stands for LEVEL LEVEL which is what i would like , ideally, on my chart.
i cant really change the source data to LEVEL LEVEL as i would receive it in abbreviated form in future.

please do reply if im not making sense, but basically on the chart, the name labels of LL,SW, etc above the 0, i would like to change their name

i have searched elsewhere , you tube , etc, but am getting just how to change headings, legend, name etc.

so much thanks for any help whom may know an answer to this

steve

Many thanks, ill think ill just leave the table with abbreviated data labels. i cannot change the source data, but i will look into a helper column. i guess that will identify the abbreviated data, e.g LL and change it automatically to LEVEL LEVEL. thanks for help