Arduino Uno to Control PWM Fans?

So it is assumed we know how you plan to connect the molex ?
I didn't see that mentioned in your post. Are we supposed to know what you mean ?
I mean if it is so "simplistic" why are you posting here and what are asking for ?
Is there a question here somewhere ? I didn't see any question marks.

Did I offend you because I asked how are we going to help you if you don't explain what you mean ? I don't see how that be interpreted as an offensive remark . And regarding the question mark , was I not asking you if you have a question and you interpret that as "being picky " because I said I didn't see a question mark. How can we help you if you fly off the handle when we simply ask you what exactly it is you want ? Please explain this to me . I am not understanding where you are coming from. I asked you for a schematic and you reply that is too simplistic

I didn't bother as it is way too simplistic and would basically be a waste of effort compared to merely explaining it

(and later confess that you don't know how to draw a schematic) .

and making a schematic didn't cross my mind. I just barely managed to remember most of the basic signs in schematics.

When I asked you this:

Are you too new to electronics to draw a schematic with pen and paper and take a photo of it with your cell phone and post it ?

(which looks to me like a straight-forward question, devoid of sarcasm or attitude) Is there any reason why you could not have simply answered "Yes, I am" ? So that we could go to Plan-B where you simply post a wiring list of how you want it connected ?

so I then reply "then why are you posting ? What do you want ? and you get upset and say you won't ever use the forum again.
If I am here to help you and I can't understand what it is you want, am I not supposed to ask you why you are posting ?
On what do you base your judgement of my attitude ? (on the fact that I am trying to find out what you want and you find that offensive ? Help me out here .

I probably going to never use this forum again if most of the members are like you. .

You might as well shoot yourself in the foot if you're going to do that because it is the same thing as far as learning about arduinos and how to use them.

Luckily for me, there are many alternatives

Really ? Name a couple . We have people all over the world with 20,30, even 40 years experience in every field you can imagine
available to answer any question 24/7/365. You would be foolish not to take advantage of that knowledge base.
My advice to you is collect yourself and start over. Make a wiring list of how you want your connectors wired. As far as learning how to draw a schematic, here are some links to help you.

http://www.learn-c.com/schemat.htm