cn_cnt port available?

[stefandier]

Hi,

we have several cs-eu12aky-8 AC units. I opened it up but couldn't identify the required port? Could someone have a look at the pics and tell me if I am overlooking something?
https://drive.google.com/drive/folders/17f7msujo_vw5WHOx-DJ-kFhgy-Mf_n2e?usp=sharing

Thanks a lot for your help

[breithack]

You might want to open the black cover in picture 1 and see what's under there