Roland VersaCamm SP-540V Service Notes page 171

7. Engage the brake.
Using the machine with the brake disengaged may result in unstable media feed, leading to poor image quality.
8. Install the drain bottle.
Remove the bottom plug from the bottom surface on the right side of the machine,
then screw in the drain bottle in the direction indicated by the arrow.
When threading the bottle onto the machine, turn the bottle without applying excessive force.
The bottom of the machine
Drain Bottle
7-6
Brake
Bottom Plug
Remove the bottom plug by pulling
straight down, without tilting the
plug. Otherwise discharged fluid that
has collected inside the bottom plug
may spill.