I am sorry to hear about the issues you're having trying to gain access to the connectors behind the tail lights of your 2016 Lexus NX 300h. I reached out to my contact at Tekonsha to see if he had any insight on this and he said they haven't received any customer feedback themselves on the T-One # 118652 regarding the install process so he wasn't able to provide any additional info.
I definitely do see the other customer reviews that you mentioned describing similar trouble though. You... view full answer...