This isn't tech support.
Just a group of Archicad users that may be able to help you with a solution/s for your problems.
What formats can you save your objects as from Solidworks?
Compare that to the type of files you can import/merge into Archicad.
.3DS seems to be quite a common file type for objects that many softwares can save and read.
.OBJ may be another.
Archicad can open either of these.
.3DS needs an add-on that you can download from the HELP menu if you don't have it already.
One of the forum moderators. Versions 6.5 to 26 Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10 Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11