I wanted to know specifically who the “right hand possess” in the verses are being referred to, does right hand possess means slaves? I have read online, that intercourse with slaves was allowed outside of wedlock is that true? If yes, then why shouldn’t they first be married regardless of the woman being slave or not.

Walaikumussalam
No intercourse is not allowed but they can marry Slave girl if they are not able to marry free one
Wassalam