I have a 24 LX600 and I feel dumb or blind. Where does a trailer plug in on these things? I don't see anything near the hitch or up underneath where the manual says it is. Did I spend six figures on a BOF SUV that doesn't come pre-wired? Also, if they don't come pre-wired where do you get it? There's nothing listed on Lexus' website as an accessory.