You need something like this.
https://www.amazon.com/Antenna-RP-SMA-2-4Ghz-Extension-Notebook/dp/B07QKF18KM
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For the Wifi and Bluetooth - Intel Wireless-AC 9260 is pretty good. Or you can go for the newer AX - if your network supports it. Up to you.
Today, I installed an 8th Gen NUC in an Akasa Turing case (bought on Amazon). The process took about an hour. Somehow it shocked me at how quiet it is now. It makes the same amount of noise powered on as powered off. I knew that would be true, however, it still surprised me that it powers on dead quiet.
I saw at least one person reporting that the NUCi7 runs hot in the case. I decided to get a NUCi3 to avoid any issues with it being too hot. (The NUCi3 has plenty of computing power for my needs.)
Some notes if you want to do it too:
The CPU is hovering around 32°C with just a browser running.
https://www.amazon.ca/Antenna-Wireless-Network-Booster-Adapter/dp/B07QKF18KM
They are offered below it in a package.
If you get just the bracket then buy this: https://www.amazon.com/dp/B07QKF18KM/ref=cm_sw_r_cp_apa_i_SsBwFbY01K0CY
I believe so. The antenna I am using on the receiver came with it and states 5.8ghz on the side. The antenna on the transmitter should be 5.8ghz according to the listing.