Hello.
I couldn't order a 10-pin cable from Furuno. Furuno USA and Europe were very helpful, but they couldn't provide the pin numbers.
So I ordered an Amphenol connector with a cable end, but the cable colors are different.
After a lot of searching, I found the combination: white, green, and blue, connected to the 9-Dsub connector, 2, 3, 5, 4-6, and 7-8.
Then via 9-Dsub USB to my laptop, com1, 4800 baud.
I ran Furuno upgrade, which went from v2.02, v2.03, to v2.03.
I also have v2.05, but I didn't install it because there's no documentation for it.