Wiring Connector

I need to replace some wiring running into the door (Speaker cable is faulty) and need to strip out the connectors from this plug...

Any idea how to get the connectors pins out, or re-new the connector (I'd like to keep it the same if possible)
Cheers

It's much easier to start again. But if you really want to get the connectors apart, they can be dismantled by pulling out the orange locking tab and using a pair of very small flat blade screwdrivers pushed down the sides (one each side) of the pins to release the locks. The pins will then pull out of the back of the connector.

I've been fiddling with the exact same connector plug - intermittent sound from the passenger side speaker.
I was going to take it to bits but electrical solvent spray and a good poke with a screwdriver seems to have fixed it.
Found these tools on ebay as mentioned above but they ain't cheap for a full kit.