Yep, that's probably a missed opportunity on my part - I assumed the supplied loom for the lightbar would contain the relay and the fuses etc and the connections would be labelled as such.
Most of the ones I've seen have been like this when sold as a 'ready to fit kit', but you do get them with just two wires and you have to supply the rest of the setup.
Normally, it would be a supply connection of decent gauge wiring through the controlled/switched side of the relay which contains the right spec fuse, just connect that to the + and - on the battery. Then the only other bit is the control side of the relay which switches the light bar on and off - this from the kit looms I've used comes with a little push button switch for control of the headlight on/off and this can either be cut into the high beam + and the light module - to run off the ignition switch, or off a switched accessory feed off the ignition so that you can't leave it on and drain the start battery.
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