Local integration, no cloud preferred.

What's the 5 pin plug on the right for?

The fans connected to this controller have stopped lighting up all at once. They still blow and can adjust their speed. Just no light.

Can I control their light/colour from JRGB on my motherboard?

I don't have a cable for the 5 pin socket on the right.

As you can see, it has 2 of each terminal. The supplied wiring diagram only shows one being used. I have two identical 24v strips that I want to dim together - can I just wire them both in?

What's the best way to restrict my Android devices to only use approved apps? I want to manage the whitelist remotely.

Bonus points if I can keep everything in-house, on my home server or similar via my existing VPN.

This is for my kids' future phones. Ages 12 to 16.