Where is it? ie. which seat and which side. Looks like something a phone cradle might plug into. The socket looks like an RJ45 and the box looks similar to thsi Nokia
https://www.gounlock.com/productImg/...5_nok_n90.jpeg
or this China Miracle...
http://www.techgsm.com/RJ_45_Infinit...cle,48350.html