You do not need to have a press to set up a DZ. I set mine up with out a press although a press would certainly make getting through the cable easier. I had to retie mine a couple of time as the string would bunch up and create contact with my arrow. I just ran the launcher string through the cable in a diffrent direction and it cured the problem.

As for where to tie the string in I do believe it needs to be through the cable and below the rest. you will find that the rest will rise much better if it is set up with this configuration. If you tie to the slide it pulls the cable forward when you draw as the cables are trying to go back. This just can't be good for the bow.