This provides a visual reference for wiring of the components. They aren't true to scale, just meant to be used as reference.
Two 9V batteries are wired in parallel, with both the negative and positive wires tied together respectively. We can use 9V battery clips to make solid connections.
Wires from the battery clips are spliced together into a 2-pin JST cable. A momentary button is wired inline with the negative connection to allow the circuit to be opened and closed with the press of the button. In this project, we'll construct our own push button out of chipboard and copper tape.
A coil of kanthal wire is connected to alligator clips and wired to the positive and negative connections respectively. It should take about 3 seconds to fully heat up the coil.