2021 cabin harness

[Patch71]

Hey all. I'm transplanting a complete 2021 Sierra Denali front and rear seat setup into my 1995 K2500. The hard work is done(2021 sheet metal for hanging the rear seat and belts) I'm running into a huge roadblock concerning the cabin to seat wiring harness connectors. What harness are they a part of? I can find the seat harneses all day long, just not the chassis/cabin to seats. I'm not going to clip the connectors and hard wire them. Can anyone helpme out? I have found many available harnesses on ebay, but none have the seat connectors. Thanks in advance.....and yes, I checked with dealership parts departments and that was less than helpful. 

Edited March 3, 2024 by Patch71
Pics

[Patch71]

Anyone know which harness the seats attach to??