How do I connect two switches

Hi thanks for reply.

When l mentioned other kit l mean Hive control for central heating etc and another hub for home lighting control (Phillips Hue).  When l added the second switch which was connected in series if you like then with another port connected to the router  the two hubs would not work/connect. However when l connected the hubs to the other identical switch all worked ok. That seemed strange to me. 
I will try two lines from router to each switch as soon as l make up a new cable.

Regard to speeds no idea what the router gives but as l said both switches 10gb also the Nas drives on my network. The connected pc l just finished building is only 2.5gb  motherboard as no spare slots for a 10gb card as used in my old scrapped pc. So a mixture of speeds.

But my main question is should l connect each switch individually to the router or just loop them together with one line to router?

Hope your crystal ball has a good holiday. Lol

Thanks again