question

That's alot of cables into one small set of bus bars, use a lynx power in, they're the distributor minus the useless fuse indicator pcb, and therefore half the price. Inverter and all chargers on the distributor then batteries on the power-in, connect both directly or by 0 gauge cable with suitable crimp lugs, with this setup you can add a bmv if you so choose.

No problem, your paint skills are better than mine, so looking at the setup the current expected is approx 300a during intense normal use which leaves plenty of capacity however the batteries will need 00 cable to carry that kind of current more than 3 meters without an unacceptable voltage drop, so that's a big cable, the multiplus requires either 00 gauge for a single wire hook up or 0 gauge for a dual wire hook up so again big cables into a little bus bar box, if your going to use the venus to take info from the batteries onboard informatics then you won't really need a bms negating some need for both a lynx distributor and a power in, however, for neatness and flexibility of install I'd go with having the batteries on the power-in and everything else on the distributor, this is especially helpful as you can fuse the batteries from the load in the event of catastrophic failure. It's worth spending the extra $120 aud.