I don’t own the IC-706mk2, but I do not want your question to go too long without a response. I do not know if there is a pre-made splitter cable.
Another user here wanted to break out the 13 pin DIN connector for ACC on an IC-706xx:
You can also search using the tags:
https://forum.digirig.net/tag/icom-ic-706
and
https://forum.digirig.net/tag/icom-ic-706mk2g
73 Constrainted