Burning vinyl to CD via mixer query

Hopefully somebody may be able to help with this.

My home set-up consists of two KAM turntables and two separate CD players plugged into a two line mixer, which is in turn plugged into my amplifier.
Both lines on the mixer each have two inputs [a switch flicks between each one] with a turntable and CD player connected to each line.
The volume button on the amplifier is permanently set in the same position [about 40%] while the volume for what I am listening to is controlled via the mixer.

When I was burning vinyl to my standalone CD recorder the strength of the recording level was controlled via the mixer i.e to produce a signal between -0.3db and 0db required the levels to be up at the top.

The standalone CD recorder has now given up the ghost.

I am planning on connecting my laptop to my system and using an editing program like Wavelab or Audacity.

My query relates to the connections.
I understand that usually the turntable is connected directly to a PC/laptop.
However because my turntables are routed through the mixer [and I want to keep them like this] should the mixer then be connected to the laptop? If so, which way should it be done?

Thanks