Unless both the router and rhw switches support link aggregation, and you configure it properly on both, each switch should connect using only one cable.
You could connect other devices into either of the spare ports on the router, if convenient. Maybe a home server or something?
Fwiw, the 4 ports on your router are part of a switch too, just one that is built in. And there is at least.one additional logical port, that connects from that built in switch to the router part internally.
Unless both the router and rhw switches support link aggregation, and you configure it properly on both, each switch should connect using only one cable.
You could connect other devices into either of the spare ports on the router, if convenient. Maybe a home server or something?
Fwiw, the 4 ports on your router are part of a switch too, just one that is built in. And there is at least.one additional logical port, that connects from that built in switch to the router part internally.