Thanks for the reply!
Yes, the components(there are 5 different) were made by a colleague of mine, ten years ago, they only appear as interface to user logic, and a .vhd file.
I tried going through a component, but there are some discrepancies where I am not sure what to do exactly.
E.g. I have a component where the data is inout, but I have to do a separate read and write data line in Platform Designer, I'll try to attach some screenshots of the component from SOPC and my try of implementing it in PD.
Bear with me, I am a novice at Quartus, and a bit under time pressure