This was my first build, I was a complete noob on the plugs and controller etc.
I bought mine off PSW, the shipping was bit high but they were prompt.
If you can wait, aliexpress seller below is bit cheaper and have more options.
If you pick the waterproof plugs option for controller and display, it makes for a cleaner build.
https://www.aliexpress.us/item/3256801924480921.html
Pls post pics, I bought the little eggrider style display and a controller for a stealth build
[edit]
I posted the same link 2x by mistake,
https://www.aliexpress.us/item/3256802480483433.html
here they have the combo with all you need, make sure you get brake leaver and throttle to match the connectors.
here is what I bought, I have brake levers already and I avoid PAS.