Urgent! Change DIN 1505-2 citation

Dear community.
I need your help really bad! For my master thesis it is important to use the DIN 1505-2 zitation style.
There is a style in the zotero cloud, that fits almost good, but the citations are like this:

[HESN17]
[HESN17] Hopkinson, N. ; Ellis, A. ; Smith, P. ; Norazman, F.: Smoother and stronger high speed sintered elastomers through surface modification process. In: International Journal of Rapid Manufacturing Bd. 6 (2017), S. 155

I need them to be like:

[HOP17]
[HOP17] Hopkinson, N. ; Ellis, A. ; Smith, P. ; Norazman, F.: Smoother and stronger high speed sintered elastomers through surface modification process. In: International Journal of Rapid Manufacturing Bd. 6 (2017), S. 155

So I have to change the xml. script to only put the 3 first letters of the first authors last name in the square brackets.

This ist the script that has to be edited:
https://www.zotero.org/styles/din-1505-2-alphanumeric?source=1

pls. help me as soon as possible!
Thank you so much!
  • The format for Citation Labels is not something that can currently be edited in CSL styles, unfortunately. It may be possible to control them via data entry in Zotero.

    In Extra, enter the citation label for the item like this:
    Citation label: HOP17
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