Connect the small drain tubing to the water softener valve drain fitting. Then connect the overflow drain hose to the drain elbow on the salt tank. Both of these hoses need to be positioned so they can drain water into the drain. The two drain hoses require an air gap and cannot just be pushed into any drain pipe. Anchor the drain hoses so they are above the drain standpipe.
A trap is required for all drain lines, in this case there was a capped drain line coming out of the wall so I installed a trap for the discharge of the water softener.