The load terminals on the Victron, much like nearly all solar regulators, are acually designed exactly with this kind of use in mind.
The "load" terminals on the Victron, are , in effect , direct connections to the leisure battery/s that the Victron is charging, but with two key advantages.....
Because the load terminals pass power through the Victron, it can
a) show you how much power you are consuming
b) shut the load terminals down if the battery/s become too low.
The Victron won't shut the load terminals down when there is low/little solar power. It will shut them down if your battery/s get too low (this is what you've been reading about Kave). This actually saves you a lot of money, because one sure fire way of wrecking batteries is to take them below 10v and leave them there . It kills them. Hence this shut off feature is called low voltage battery protection. It prioritises two very expensive batteries (Calif Ocean) over a small fridge contents.
With healthy batteries, and good solar, this protection should rarely , if ever , kick in anyhow. You can also adjust the cut off voltage on the Victron app.
It may well be that the Cali has it's own low voltage cut off built in to it's electrics. I don't know.
Ciki is right in as much as your fridge should have a short, thick, fused cable run to your battery - this is because they have a high current surge start up each time the compressor fires up. Inadequate wiring leads to a higher voltage drop, and this will kick in the fridge's own low voltage cut off, and it won't run efficiently. Also, with thin wire, you lose voltage, and again, lose performance.
However, as long as you wire your Victron's battery leads up with thick, short cable, the same thickness that the fridge requires, and then use the same type of cable to connect the fridge to the load terminals on the Victron, then it's only a win situation. You gain good low voltage battery protection (better than the fridge's inbuilt protection), and you can see power usage (though that novelty will soon wear off!).
It's kind of academic in an Ocean, as it's a pain to rewire things, and they already work well, but in a a Beach, with a portable compressor fridge, I'd use thick battery cable to the charger, and hang the fridge off the charger.