Front/rear camera install help

Good afternoon all,

I did the install of the harnesses last night, then started again this morning and I cannot find the plugin for the middle white connector for in between the two daisy chain camera harnesses for the back of the radio. Now, I'm 99% sure it exists, but I have dug around in there and have found nothing. Anyone happen to know what wire loom it comes off of so I can locate? Feels like I've taken crazy pills.

Edit: Shortened to avoid confusion.

 

Put it all back together and I can't find one thing that doesn't work on the radio. Still wondering if I'm missing something, but so far, so good.

 

Confirmed, for anyone looking, that there is an open plug in the JBL system.