Meritor reduction/ power divider diff fluid

05 volvo VNL cummins
So i want to change out my fluid on my diff/power divider. Looks similar to the pic below.


rt40-145/mt40-14x 40
Diff. with tandem power divider

My question is where to add and check the level. I called meritor and they said the normal fill line at the diff cover.

I was just surprised that the amount of fluid for this would be the same as the rear diff that is only the diff. I was expecting to have a fill/check location higher up on the power divider or a separate hosing of fluid on the power divider to also drain and check.

Is this correct? Check it same location and fill amount for front and rear diffs with or without the power divider?

 

Got it done thanks!