Get multiple ID from sub-process to be process Read Data Object

HIi,

I have a question regarding passing clicked data from list in business process. Using sub-process i was able to get the clicked values ( i think ). 



However i want to pass the value via Read Data for these ID's. I tried several parameter but ended not showing after i click the <?> in the read object. How do i obtain and loop for each of the ID's?

Thanks before!