According to the Centerpoint folks you need to set the arms on each side of the bag with enough pressure so they are parallel with each other. To do this properly you need to have each side plumbed separately because it is highly likely one side of your fiver will weigh more than the other. I installed a set this spring that way and they certainly made a difference in the ride of the trailer. When they are parallel the distance between them should be about 5". I have a pressure gauge for each side and the road side takes about 10 more pounds of pressure to get the proper distance between the arms than the curb side.
JimT
2020 Jayco Pinnacle 32RLTS, 2020 Ford F350, Platinum, 6.7 diesel, 4X4, CCLB, SRW, 12,400 GVWR