Fitting aftermarket head unit to 04 VY commodore.

Its a 2DIN unit.

Solder wires together?

or get adapter and use pins to plug wires into new headunit?

Im keeping the car for a while so solder?

or for easy installation,use adapter plug and pins?

Get an adaptor, easier. Can also pin the harness AFAIK but will need crimpers + pins.

Yeah I've asked Gold Coast car sound. And they use pins. But im going to keep the car for a while.

They are called but pins? need to crimp them onto new head unit wires and plug into appropriate spot in factory loom plug ?
right?

correct

Yep, those are the ones. Completely reversible for the factory loom, and along as they are crimped properly and taped up well they are very durable.

I've used Aerpro adapter looms with great sucess in the past, would highly reccomend them to anybody.

www.aerpro.com.au