OCPD question and 3S2P or 2S3P?

I have 6 panels on order at 320 watts 40 open volts each looking into series parallel combination as charge controller is 150 volt max 2400 watt max. Do the OCPD fuses then go at the positive end of each series array? I am not clear on where best to put those? Also what size fuse for the OCPDs? Finally am I better off with 3S2P at 40 voc each or 2S3P?

Thanks in advance for your advise!

Whole lot of depends…..

If shade is a factor, parallel; if voltage loss is a factor series.

What is the AMPERAGE ratings of the panels.

From the product specs:
Specifications
Maximum Power: 320W ULOpen Circuit Voltage: 40.1Maximum Series Fuse Rating:15A
Short Circuit Current: 10.08A

So I am inclined to get 15 amp fuse based off of the "series fuse rating" but the "short circuit current" is 10Amp so thought perhaps I needed 10 to be safe?

15 amps per string is fine; two for 2S3P and three for 3S2P. 10 amps could blow. There’s certain circumstances your panels could over-perform for a short period of time.