itl be fine... it doesnt matter if you have a female connector left over. Its supposed to be that way. It wont harm your computer at all.
And Just so u knw.....
Normally, you dont want everything hooked up in a single string because that can cause a strain on the psu.. Just think of each plug coming from the psu as an individual source
Also, just to be cautious you should make all of your fans connect in a single string. Because if one of them shorts everything on that string will probably recover with damage as well.
Also try to balance out how much each "string" uses. Dont put to much on each "string" try even it out.
I hope you understand what im saying, i dont know how else to explain. I think they also might be called rails, but im not sure.
If ya need any more assistance just PM me, ill be happy to answer your question ASAP
Good luck with your new build
You also should really consider getting a new Power Supply
Practically all PSU's that come with a Computer Case are cheap and unreliable.
I have that exact same case and psu and the psu died after 1 month.. then I got a name-brand one and it has been with me ever since and is 430 watts.
Also, when you ever consider getting a psu, dont just look at the peak watts, look at the railings. Usually you can just rely on the brand.