Looks like I'm walking in the footsteps of others. I couldn't find this initially but trying a different approach yielded GreenWattPowers website with datasheets, which funny enough eventually led me back to the unofficial manual that already had this information.
https://zeromanual.com/wiki/Gen2/Calex_Charger/ConnectionsThe CAN connection for the onboard charger is a JAE MX23A18NF1 wire to board connector.
so JAE MX23A series connectors are used for ECU connections on many motorcycles (Suzuki's?) and apparently equivalent pitch/diam metripack open barrel crimpers will work for wire seal and crimp if you want to avoid the >$300-$4000 OEM connector crimping tool by JAE. Sadly only wire to board and no male wire-to-wire option exists according to my research, so for a DIY harness this would mean soldered connections in a pigtail (not ideal) or small box.
"MX23A series 040 contact 2.5mm pitch, 18 pos, 3A 7A partial on some connectors, only 50 cycles
AVSS AVS partially wire... #22 to 16AWG with 1.6 to 2.2mm insulation diameter #20AWG to #18 w/AVS wire"
male internal pin side (extending latch part):
full assembly MX23A18NF3 or -NF1 or -NF2
female pin side (orange socket):
front cap MX23A18XF1
seal ring included in front cap?
socket housing MX23A18SF1
rear grommet included in hsng?
rear cover included in hsng?
dummy pin M120-55780
socket contact 0.5-1.25mm^2 M23S05K351
socket contact 0.3mm^2 M23S05K4F1
-NF1=standard pin header...
-NF2=reverse pin header....
-SF3 bulk???
-SFG bulk??? reel?
I ordered the 18P and 18S kits from Corsa-Technic, along with some extra socket contacts to verify good crimps.