The wife has full liberty to enter into her matrimonial house so long she remains his legally wedded wife.
She can file a DV case praying for residential rights in he matrimonial house.
In the RCR case, she need not appear before the court if she is willing to rejoin him and willing to live together with him, she can inform the court about her decision to return to her matrimonial home, the court would take a decision to dispose the case accordingly.
If she is willing to rejoin him there is no necessity to contest the case nor there is any necessity to get the case transferred to the place of her choice.
However it depends on her circumstances and will and wish about it.