CHERRY POS question for NOMAD

hello community,

i have just buy a cherry pos G86-63400 for a DIY lighting board project.

question1 :

What are the two small black plastic pieces provided with the keyboard used for?

question 2:

I am looking for a transparent double key cover in a horizontal position; the two provided in a vertical position do not snap together satisfactorily.

Does anyone have any advice?

thx for any reply

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