Making A DC Controller

This is how I make simple DC controllers at a fraction of the cost of one from the big name brands. And it works just as well.
Links To Parts Used:
DC Connectors
www.amazon.co.uk/EFISH-Connec...
Speed Controller
www.amazon.co.uk/dp/B07QXBKMX...
Power Adapter
www.ebay.co.uk/itm/1959986102...
Wire
www.amazon.co.uk/QWORK-Meter-...
Junction Boxes
www.amazon.co.uk/gp/product/B...