Propeller shaft ?

The Maintenance guide for my '13 Taco says to "Re-torque propeller shaft bolt".
Are they talking about the four bolts that hold the drive shaft to the transmission output shaft and also the four bolts at the differential ? It's singular, as in "bolt", so I'm not sure what I'm supposed to tighten.

 

That sure is vague. Well since you will be down there you might as well double check everything since it will just take a few mins. Here’s the sticky for the torque guide:

https://www.tacomaworld.com/threads/the-torque-spec-guide.318116/

Images from said sticky:

 

Tighten them to spec and then get some acrylic paint and dab where the bolt flange meets the surface. This way you only need to perform a visual inspection each year. (the bolts are really unlikely to back out under normal driving conditions anyway)

Picture for example:

 

Thanks guys for the diagrams and info.