Ah something right up my ally!
First - This link is super nice.
So I used to work in motorsports doing wiring, and I did the harness for some FSAE cars, and this is what I have learned.
The single most important thing is your crimper. No matter which connector(s) you choose to use, if you use the wrong tool chances are it will be a pain in the *** and your connections won't be reliable.
My favorite stuff is made by Deutch. They kinda have two levels. Cheaper side would be the DTM connectors, seen here:
The are made for lower current stuff (7.5 amp max), pretty easy to use, rated for many cycles (100). The DT series itself has different sizes. You have:
DT - 13.5 amps max
DTP - 25 amps
DTHD - up to 100 amp
HD10 - Varies, has many contacts, like a poor mans Autosport (will explain later).
Each of those use different size contacts (the pins and sockets) so you need to make sure to get the right hardware.
On to contacts, I like Deutsch because they use "solid" contacts, which means the whole contact encapsulates the wire and the crimper "pinches" the wire. See this:
This is in compairson to an "open" contact, like this:
Deutsch sells "open" contacts as well, but please avoid. The crimp has a higher chance of damaging the wire, getting a poor crimp, they are harder to remove from the connector if needed because they get caught, and the holding strength is usually not as good.
So, back to connectors. The best of the best is Deutsch's Autosport line (https://www.wirecare.com/deutsch-con...as&contacts=13
These are basically mil-spec connectors that have been lightened for use in motorsports (don't need as much factor of safety and strength as aircraft). They are super cool, super small, super pin-dense, and super expensive. The size 22 contacts are good till 5 amps, size 20 to 7.5 amps, and size 16 to 20 amps. Housings come in all shapes, for example:
They can handle 500 cycles, and are so fun to use.
So, the lower end. Below those guys I like the Metri-Pack connectors (Metri-Pack Connectors - Delphi | Mouser
). They actually look a lot like that amazon link you posted. They are easier to use that weatherpack, tools are cheaper, etc. That are not rated for many cycles, but get the job done. The contacts are "open" type, but that's what you get at this price point.
I hate weatherpacks. They are a pain in *** to use, bulky, the housings are designed shitty, and taking them apart to get contacts out will make your fingers hurt and you will curse the world. **** that.
To use Deutsch stuff, you need a tool like this:
They are $$$, but so worth it. BUT!! Thanks to the aircraft industry, you can usually get a used one! And they are much better cost wise. Example: Deutsch Crimper Crimp Tool with EXTRAS | eBay
. They are so very nice to use.
For metri/weather pack, something like this:
Then you need a wire stripper. My favorite: Stripper!
And a good wire cutter:
OK I need to stop before I get too carried away. Last comments. Heatshrink - Raychem DR-25 is the gold standard. Look up how to do strain relief and proper wire twisting. Wire - use Mil-W-22759 stuff!! And pull test all crimps!!!!!
Hope that helps!!!!!