Disabling multi-flex tailgate

[GmEnjoyer]

I have a 2024 with the multi-flex tailgate but without passive entry so the lockout or disabling of the top gate does not function. https://gm-techlink.com/?p=17915  I would like the have the disable feature if possible. From the little I can find about it I need the low frequency antenna and rear bumper antenna bracket. Is this all I would need to allow that function to work or is it more complicated then that? I would assume these are the parts as it is all I can find on Gm website for this truck. Low Frequency Antenna  Rear Bumper Antenna Bracket I do not know where it is located to see if I have a plug even there or I would just get the parts and see if it works. I do have a mysterious plug right behind my license plate, I will have to look closer under the bumper to see if anything else is there. 

Edited October 6, 2023 by GmEnjoyer

[GmEnjoyer]

After looking at another truck the plug behind the license plate is for the antenna and the bracket mounts right there. I'm thinking most likely it is not plug and play, probably have to program it to the truck. Also looks like the antenna might come with something for the key fob so that might complicate things.