The seals come pre-notched and they were spot on. At first the notch for the bracket was off some, but that ended up only being due to user error.
After several failed attempts (mounting the seal in the frame first, using Windex as a lube, etc) I ended up installing the seal onto the glass first and then liberally lubricating the seal and the frame channels with white lithium grease. I then slid the glass with seal into the frame channels making sure to set the seal into the far corner as much as possible. Make sure the seal doesn't slide back on the glass while inserting it into the frame as you'll want as much of the rubber towards the far corner to help with installing the frame end piece later. Make sure to push the seal down around the bracket as it tends to ride up some. The seal notches for the bracket should be touching at the top and the bottom of the bracket. Viola!. A few minor taps on the end of the glass with a mallet to set everything and you should be good. If not, go over the seal's entirety 'walking" it towards the far corner. Make sure to check the slickness on the remaining exposed seal and channels as the lube may have dried up some by now. This next part was sort of tricky as the frame piece is slightly curved and I didn't want to risk marring my frame's paint. I slide the end piece on and then using my body as a base I pulled the end piece toward me until I could see that one screw hole lined up with the mounting tab of the frame. I loosely screwed in a screw and then flipped the window over and did the exact same to the other side. Once I had two of them in getting the last two was easy. All in all this took a few hours because my components were filthy and needed to be cleaned before I could attempt the install.
One frame down, one to go. I'd guesstimate the next one will take about 30/45 minutes. Good luck!
Fantastic quality and fit! (I only wish I would have purchased the outer seals from Datsport, too as the Datsunland socal one's are too big and are basically made of foam
If any of you are as finicky as I am you can still get the correct screws for these windows and brackets from nissan. You'll need 11 per window as the hinges also use the same screw.