With 2pcs - 4pin relays, you can wire a small control circuit and still have a spare on hand.
5pcs SLA-S-105/112/124DM 5pin 30A250VAC Relay
It's a contactor relay, which means it handles heavier tasks without breaking a sweat, and that's reassuring.
The LK-61644 feels familiar in the hand, and its clear name helps you stay organized "You will find that the LK-61644 sits nicely among other relays, with its model name easy to spot.
A nice touch is the Square D brand on the relay, which matches other gear in the panel.
You will find that the Relay Switch model makes connecting relays to controllers straightforward and neat.