AIG details the signficance of the discovery of the Nuzi Tablets here. They are helpful in understanding the incident of Rachel taking her father’s household gods. Excerpt below:

Previous to the discovery of the Nuzi documents, the whole situation was obscure, and it would have been equally so at the time of the Israelite kingdom when, according to the critics, the story would have been composed. The tablets from Nuzi show that according to Hurrian custom at that early time, if a man desired to appoint a son-in-law as his principal heir he would turn over to him his household gods. After the man’s death, appearance in court with the household gods would be accepted as proof of such a disposition. Rachel was trying to secure all of Laban’s property for her husband, and Jacob was rightfully indignant at being accused of attempting such an underhanded trick. The whole incident becomes understandable in the light of these facts, and it becomes clear why Laban, still suspicious, desired that a boundary stone be put up at Mizpah, and that Jacob should swear that he would not pass over this boundary in order to do him harm (31:44–53, esp. v. 52). The Nuzi tablets make it clear that a great part of Laban’s reason for this was his desire that at his death, the remainder of his property should go to his own sons and not be taken away from them by Jacob. It is good to note that later Jacob demanded that any strange gods in the hands of his people be buried (35:2–4), and that at no time did Jacob try to make false use of these teraphim.