Connecting multiple devices to I2C

I suppose, this is obvious for pros, but it a discovery for me. So maybe will help somebody else.
So I just soldered this block of parallel pin headers and it works just fine for attaching several different devices (different devices with different addresses).
Please, correct me, if I’m doing something wrong.

Yes, you’re right.
Most cards have built-in pull-up resistors, if you have a card that doesn’t have those, add it.
If you have a communication, most probably you have though.

Yeap, working without a resistor.
Now learning, how to read data from a temperature sensor with LUA.