Starter motor sparking against engine

[Blu383]

Hey guys, I've got a vt 5.0L berlina and I've just noticed the starter motor is sparking against the engine ( same as a dodgey spark lead would against exhaust)
Could. It be loose bolts or starter on the way out?

 

[Tasmaniak]

The main power cable running from the battery might be loose or tightened up at the wrong angle. Thats the only part that can spark... is the cable or the bolt and nut that hold it to the solenoid.