Musk turtle sexing

[CuriousTortoise]

So i got this lady yesterday, or atleast i was told it was a lady. After checking some photos online im a little unsure.
Anyone have an inkling of what it is? just so i know if i'll need a nesting spot in my custom build

 

[Markw84]

Too young and little to tell. Needs to grow more to develop the secondary sexual characteristics.