Climate/Heater control disassembly

Does anyone know how to disassemble or remove the fasteners for the climate control. I want to replace the plastic pins that the cables connect to. I read a thread where someone replaced the plastic pins with a clevis pin. (3/16 x 3/4) one of mine broke so I figure I'll do the clevis mod to both. I just need to figure out how to remove the fasteners that seem to hold the thing togeather. Hopefully without destroying them or the control unit. Also what are these fasteners called?
Last pic shows broken plastic pin.

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