I'm in a 2g zone...but I did find a pic that didn't take an eternity...No high level(high level is speaker wire in and out for use where there is no subwoofer output).If your cable is shielded(coax) and you have random pops...usually that means the sub amp itself is not properly shielded(mass...
On phone, so I can't look...If the Dynamo has high level, switch to that(Not permanently) to see if either problem goes away. Just set it along the front speakers as all you are doing this for is ruling out a dying amp.