Is it possible to use 4 RJ11 inputs at once with this?

I am new to all of this! But it is so much fun.
I am building a weather station where I need to take input from two sensors using RJ11.
Would this allow me to use both in parallel? I am assuming so…

Just to be pickey, the board has 4 RJ11 jacks on it and the 6 pins are all in parallel with the screw connectors on the end of the board. The RJ11 jacks take 6P2C plugs with your wires attached to it.

Can you explain a bit more why you need to parallel the sensor connections?