Between the battery positive(+) and the starter motor, there's the intermediary starter relay. The *other end* of the battery cable bolts onto the B post on the starter relay (B=battery). Take a pic of the old wire routing in case it's needed. Note orientation of the connector.
[edit] true dat, hubcapsc, the second starter motor cable goes from the starter relay's M post to the starter motor. (bottom pic., M=motor)
Pressing the start button energizes an electromagnet switch in the starter relay that internally bridges the relay's B post and the relay's M post allowing electricity to flow from the battery to the starter motor.
