Ikea Domsjö double sink, installing Atlant siphon, installation tips?

hello Ikea fans and professionals!

we bought a domsjö double sink and are struggling with the installation of the Atlant siphon. maybe someone can give me the crucial hint. we found the longer screws that are delivered extra with the domsjö, but I don't know what to do with them. where is the screw supposed to bite? I hope someone knows what I mean and can help me with a tip or maybe even a photo - I just don't get it.

many thanks from stocki

Could it be that there were regular screws included with the sink, but with the Atlant siphon there were (for Domsjö too short) "screws" that are hollow inside? If that is the case, then the long screws are probably still for the old Atlant siphon and you need to get the new screws from IKEA or have IKEA send them.

yes, that's exactly how it is. so [atlant] has been changed in the meantime? well, that certainly explains a lot. i'll call right away. thank you!