Connect UPS USB and Serial Data Port to two devices

[MikeInMI]

I just purchased the UPS Pro BX1500M.  My primary devices to protect are my Mac computer and my Synology NAS (Linux--based network storage).  Each device has the ability to connect via a USB port to the UPS unit and initiate a controlled shutdown if battery backup is in use more than X minutes or other parameters which I set.

There is only one cable supplied and one connection on the back of the UPS.  To connect to a second device, I am looking at buying this splitter:  https://www.amazon.com/dp/B092YLKGCY/?coliid=I11TT3NWS6EEEA&colid=12FUFOPX2JGCZ&ref_=list_c_wl_lv_ov...

and this additional cable: https://www.amazon.com/dp/B082VZTB57/?coliid=I38JYAEPGZMFXO&colid=12FUFOPX2JGCZ&psc=1&ref_=list_c_wl...

Will this work?

Thanks in advance for any help you can provide.

[BillP]

@MikeInMI 

Sorry, but neither will work with the UPS. A UPS can only have one device communicating with it via USB. You could connect the UPS to the Mac and use Apple scripts to trigger the NAS's shutdown. Or, do the opposite and run a script on the NAS that will power down the MAC. 

[Chris17]

I have the same issue. Could you help with a script for the Mac to shut down the NAS or vice versa? How do I do that?