Security: fence + surveillance + small hidden visible forts and caves + intelligence
Lobby: After securing the border specially in trade zone areas first and trading gates, Use the same Afghan refugees to promote pakistan's lobby within Afghan Administration and keep an eye on them.
Trade: After lobbying there should be pakistan's centric mindset specially regarding trade within Afgan Adminstration to control the tarrif/duty.
Beleive me handover this job to me. It's like 2+2 = 22 for me.
For un-smuggle-able items; Export to Dubai and re-import under the UAE label; therefore no duties
everything else will be smuggled
the areas where smuggling can be done will get rich trade routes out of the rule of the kabul government
it will incentivize those areas to turn away from Kabul...undermining allegiance to that government