ESP Connectors: 8-Pin vs. 10-Pin

Hi.

Here:
/viewtopic.php?t=1583&highlight=part+number+for+pump+connector
There are different part numbers for the 8-pin and 10-pin connectors of the ESP plug.

I can confirm the part numbers for the 8-pin version, as they work for me.

Since I also want to build a 10-pole version now, I'm wondering why my AKTE (presumably a piece of equipment or component) is malfunctioning with the 2x 5-wire configuration.

Does anyone know more?

Thank you.
m;

Edit: Do the 10-pin connectors have different locating tabs? Is the distance 1.5 instead of 2.8 (what unit is that, whatever it refers to)?