I too have been looking for a way to get the machine to accept a new card to drive a 4K display. My research indicates that the PCI-E slot is a bit of a legacy from a time when our machine's display driver was not integrated into the motherboard. Now that it is, all the cabling runs from the motherboard instead of the card. I also understand that the card was specifically designed for Acer.
That being said, the slot is probably still active. My plan (once my wife and daughter have tired of watching TV on the little 4K display I got) is to take the mounting bracket off a card designed for a tower style computer while leaving the output ports supported and insulated somehow (crude, but wrapping with a few really wide elastic bands has worked for me in the past). I think a really carefully weilded coping saw might be able to remove enough of the bracket to make one fit.
Acer Aspire ZS600 Pdf User Manuals. View online or download Acer Aspire ZS600 Service Manual. Aspire ZS600 Graphics Card Installation. I found a service manual for this model but my version did not have a graphics card already installed. (like the Acer.
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Then, you would have to be willing to drill a new hole in the casing to allow the connector from whatever external display you are wanting to connect to get at the port on the card.
Presumably, the needed software drivers will come with the card.
Haven't done this yet, but if you are feeling adventurous and want to give it a go first, I would be happy to hear the result.
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A user manual will show you all important operating steps and correct handling with the product. All the useful information published in a user guide should be easy to read, so that you be able to unterstand all technical operating instructions.