The Jigsaw Platform Bridge™ allows daytradr to connect directly with the NinjaTrader 8 Platform. There is no need to set up a connection profile in connection Manager for NinjaTrader, there is also no need to download instruments for NinjaTrader.
What you do need to do on the NinjaTradr side, is set up Market Analyzer with 1 instrument (e.g. ES ##-##). Ninja will send all trades to daytradr, regardless of which instruments are on the Market Analyzer.
Note that you do NOT need to follow the instructions for opening the Jigsaw Tools - just set up Market Analyzer and you are good.