Your 30-pin cable or accessory plugs into:
$4
which plugs into:
$4
which you plug the cable your phone came with into.
What would simplify this would be a 30-pin Female > USB Female cable but I haven't been able to find one. It would eliminate the need for that USB Female > USB Female block I posted.

$4
which plugs into:

$4
which you plug the cable your phone came with into.
What would simplify this would be a 30-pin Female > USB Female cable but I haven't been able to find one. It would eliminate the need for that USB Female > USB Female block I posted.