A quick and easy way to connect to the relay if you don't have a socket is to use Molex .062 female connectors on the pins. Just push them on.
 
See attached.
 
Tom

Please note: message attached

From: Tom Hunter <[email protected]>
To: [email protected]
Subject: [GreenKeys] 255A Polar Relay Wiring
Date: Mon, 16 Jan 2023 11:59:11 -0500