The best way to attach it is with WS itself but the opp party will try its best to make it fuss.
If you do NOT want to get it fussed then try to make an application & alongwith that application attach it.
If the wife has a aadhar card in her married name but she gets her voter card prepared in her maiden name without following a valid/ legal name change procedure then instead of just mentioning it in the preliminary objection you ALSO need to make an application like NAME FRAUD APPLICATION. In that application mention that her plaint be dismissed due to NAME FRAUD BY PETITIONER. Amd also mention that the plaint is technically not valid i.e., does NOT stand as a petition due to lego-technical fallacy. Lst but NOT the least attach the exampls like:-
(1) Aadhar Card was prepared in the name of TOMMY SINGH S/o SHERY SINGH (i.e., in the name of a DOG)
(2) A Khalstani Terrorist was arrested for possessing two identities which is a fraud & also a threat to national security
So, if you are fighting PIP then be innovative & use the judgment vehemently (forcefully thru petition & forcefully thru arguments). You need to make the judge believe that what you are saying is genuine & valid in law. Best Wishes !!!
What is this judgment all about WRITE IN DETAIL so if any idea comes to my mind I will try to write on it? Write what point u want to push in your next post. Thanks !!!