I bought 2 of these - (generic) Toyota 90980-11250 - 2 Way Connector Plug Kit Replacement Compatible with Toyota Transfer case, Backup Lights (BUL & 4WD Indicator) off of Amazon, but ended up only using 1.
Sales Pitch- I typically ONLY install OEM Toyota Factory parts for our FJ cruiser, Corolla, and out older (now sold) Tundra... but thought I'd try this particular part off of Amazon.
Conclusion- it works perfectly and saved many dollars!
This part number (90980-11250) is kind of a universal connector that works for many Toyota backup lights (Corolla, Camry, Rav4, etc...) but I used this for the locking rear diff of our FJ and can only really confirm that it is a wonderful replacement for the connector that becomes weak and / or frayed over time... or where the contacts themselves become corroded (in our case)