Any Sonoff Users on here that can help

Evening

I probably know answer but just after advice on adding some new components.

I have a 5 inch fan in my cellar connected via a THR316D relay with THS01 sensor for humidity. Fan is just wired via a 3 pin socket at present, 2 core pvc cable which goes into sensor and then from sensor it goes to fan. Comes on until humidity drops above target humidity level.

Now i want to do 2 things, i want to add another of the same relay and humidity sensor but at the opposite end of cellar so that it can monitor humidity also and then that on can also can trigger fan, irrespective of the other sensors value. One fan controlled independently by 2 different sensors

So I can keep an eye on running costs and how long fans are actually running I wa thinking of adding POW Elite 16A Power monitor just curious on best way to wire it up. Is is simply just a case of adding both ends of output on both sensors to the power elite Input and fan to the output

Its been a long day