You shouldn't have to use the supplied weight with that arm. Keep it though in case more downforce is required later on.
Basically, once the cart is attached parallel to the headshell (as square as possible at first) you have to set the counterweight to the correct vertical tracking force (VTF) for that cart, which is 1.75 g.
First, make sure the antiskate dial is set to zero and put the stylus guard on the cart. With the cueing bar in the down position, move the arm across to the space between the arm rest and the edge of the platter. The arm will now either move straight up or straight down so you have to adjust the arm's counterweight at the rear of the arm so that the arm balances out in that space and doesn't go up or down.
Once you are happy the arm is floating by minute turns on the counterweight either direction, put the arm back into its arm rest. Now, hold the counterweight still with one hand and with the other, turn the settings dial to zero. The final stage is then turning the counterweight together with the settings dial to the required setting, which in your case is 1.75 g. Each mark on the settings dial should represent 0.25 g. This sounds complicated but isn't really once you've done it once.
Finally, dial in the approprite antiskate on the dial. For that cart I would set it to 1.5g.