Yep, thanks Raks :)
Johnsonwu is right... I think tonight Ill pull out a woofer and see what I can see inside. But the crossover is certainly not reached from the rear terminal plate :(
Ill use a snug/firm torque when I tighten them back up. Just worried if the drivers are fixed into MDF that taking the woofer out, back in will elongate the hole.