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its like these its hard to see but the sensor itself can just be screwed on to it as seen in the pic, that one above u posted wont work. its almost like these are rare or something i rarely see these adapters.
I have no idea where you can even buy it but i do have one laying around just dont know the value of it so im keeping it till i kno,
but like i said you can just zip tie it some where and ur good. but for the light you have to clear the ecu to remove the light, you can also check the ecu to see why its giving cell. just google 240sx self diagnostic and read up.
also look at
Nissan 240sx Performance, Modification, Repair and DIY Articles - by NICOclub.com
NICO Club - Nissan Forums | Infiniti Forums some use full stuff on these site