ROV Help and Advice

Hi, I have a few questions, we are students and quite newbies so hope to find some help and advice.
We are trying to build a ROV. I have attached a picture of the connections.
When I connected my lipo 4S 14.8V 3000mAh battery to 3 brushless 30A thrusters, 1 ESC exploded. Now when I connect the others, nothing responds, no sounds or movements.
What could be the problem? Could all the ESC’s be ruined? Could the motors be ruined?

Thank you!!
20200401_232634|281x500

@oripaz1.

First off, where did you purchase your ESCs and what brand/model are they?
Second, were your ESCs rated for a 4S battery?
Third, were your Thruster motors rated for a 4S battery?
Fourth, do you really require a 4S battery?

Regards,
TCIII

Everything is from aliexpress. Esc’s and thrusters. Esc’s are “Shark” brand