A nice touch is the smooth spring action inside this unbranded relay, which feels reliable without being too stiff.
(20 PCS) 12V 4 Pin Relay 40A – Perfect for Vehicle Electrical Systems
You will find that Dayton relays are easy to source replacements for if one ever wears out.
What stands out about this device is the Square D name, which you might already see in your panel.
The RS-1M-SH is the version we stock, and that consistency helps with future maintenance.