Conversation Between ChromeSE5 and 20Max03

Hey man i see your Maxima all over the forums, You seem like you know your stuff and i would like to know if you could help me out with something cause ive been searching the threads for days and cant really find a answer.

I have a 2003 Nissan Maxima SE Titanium Edition and i ordered eBay JDM projectors. They say its a plug and play but its not cuase i guess i have H.I.Ds and the connections are way off. lol Is there i D.I.Y to get them installed?, cause i cant return them and spent 200 on them nd i only got the side markers in lol =/. Can i swap the inside of my stock headlight into the ebay one? (RETRO FIT?) Any help would be greatly appreciated. Thanks bro if you could help me out thatd be the best.