Power seat in a manual car wiring harness question

I hate to post what has already been covered in other threads, but I have a question about the seat wiring harness and can't find the answer. I have watched this video about making a wiring harness https://www.youtube.com/watch?v=49ztXTTpGGo&ab_channel=EurasianAuto which mostly covers what needs to be done, but it still leaves me a little stumped. He doesn't show where the wire harness plugs into the black connector, only to the seat control module On the completed seat, It looks like he cut the original brown and red wires coming from the black connector to and crimped his new harness to them, but the one in his hand seems like it pins directly into the black connector again. My new powered seat only has the blue seat belt receptacle plug in the black harness connector. I plugged in the new ones and the power backrest tilt doesn't work as I thought it would. My previous seats were manual with a power backrest. Shouldn't there already be power pins in the connector to move the backrest and I would remove them to make the wiring harness? Do cars with powered seats have another connector besides the one below that powers the seat control module?

If you have drivers side full power seat with memory, your main seat plug should look just like what you have in your hand. Go look at the main seat plug coming from the car to your seat. You'll see a red (+12 volts) wire on pin one and brown (ground) on pin 6. The first two big pins in the connector. That is the power and ground that you need to extend to your power seat memory module. On the new wiring harness you build for this, you'll be plugging red into pin 1 and brown into pin 6 on that connector in your hand (in the picture.) Then distributing those signals to the pins he indicates on the module. If memory serves, two or three pins get +12 and a couple of pins get ground. I think what confused you, and me, is that the first seat he shows you, already has the new jumper harness installed. The red and brown wires that are there are not there on an unmodified seat. Hope this helps.

Yep, that was throwing me, since he says you need to push them out with a pin-out tool. Also confusing to me, in a car with power seats, how does power get to the seat control module if not through the black harness on the seat? Is there a separate plug that comes from the car and plugs where you have to jump the wires?

yes, a car with factory full power seats with memory has a whole separate harness that runs to the seat. That harness has a 20 some odd pin connector that not only brings power and ground to the seat but also ties in the memory buttons on the door sill, to both of the mirrors and a few other things. It plugs directly into the memory module in the seat.

I had to splice in my memory seat portion of the harness from my c2 into the gt3 harness, so i can confirm its entirely external.