DTL-1SB First build

[McCreed]

Thanks it does but still not sure how to use the V1 and V2 wires from the volume pot?

I would like to see more detail of the wiring of the pots and switch. I think you got the pots right but the switch is wrong. That jumper wire shouldn't be there.

There are multiple ways to skin the proverbial cat here, but using your labelling system and existing configuration, I would do the following:

V1 solder to ground lug of switch (casing).
V2 use as bridge plate ground.
N1 and the outer braided wire from B1 to the back of volume pot.
N2 and centre wire (white insulated) from B1 to relative lugs on switch.
T1 outer braided wire to sleeve lug of output jack.
T1 centre wire (white insulated) to tip lug of output jack.

See if this helps:

Note this photo shows single core wire used, not coaxial, but the signal paths are the same.