Relay in Engine Compartment

[theshovel1224@xxxx]

List, which circuit is the relay in the
engine compartment (mounted on the bracket
that holds the light switch & ignition
resistors) wired into & what is its purpose?
Is this relay just a standard relay
interchangeable with the other ones in the
relay compartment? I have a couple of extra
interchangeable relays from my relay update
kit because I also installed a fanzilla.
Can I replace this engine compartment relay
with one of these?

John Yeoman