Hook-Up Wires for Crossover

I am doing small DIY upgrade to replace stock resistors with
Duelund silver-carbon Cast resistors in crossover of my speakers . Since there is no space on crossover board for large Duelund Resistors , I have to mount them on seperate board and then use individual wires to connect each resistor on to PC board . When I checked internal hook-up wires in my speakers , from crossover to drivers , they are Siltech M20 G7 Silver-Gold wires (1% Gold used in alloy ) . They are 17 AWG thickness.
My questions are:
1)what wire should I use to join Duelund resistors to points on crossover ?
2) Must I use same Siltech M20G7 of 17 AWG ? (I suppose they will be too heavy - around 1.5 mm thick and also very expensive ! ) . Or can I use 20 AWG wire?
3) Can I use Mundorf or DH Lab Silver-Gold wire of 1 mm or 0.5 mm thickness?
4)Is it ok to use different makes of internal wires within a speaker ?
Total wire required is 10 to 12 meters , and such silver -gold wire cost quite a bit , especially if they are 17 AWG or 1.5 mm.
your suggestions and views will be welcome.
Thanks