912uls ring mount install

I have a 912uls that was mfg’d in 2010 and ring mount part# 886561. I need to know what size and hardness bolts I need to mount the ring to the engine. And also what are the torque specs? I do not see this info in the copy of the install manual I have.

2nd question I have is where do I go to download the latest version of the installation manual and operating manual?

Thanks, Joe