Turn your chassis upside down and it should look a lot like this.
Make sure you have soft padding underneath to protect your work surface and amplifier.




Preparing the "star ground"
Using the spare 20mm M4 bolt, slide 6 solder lugs onto it followed by a shakeproof washer.




Finger tighten, then space the 6 lugs evenly.




Pre-heat the job a little then apply solder until it flows evenly around 1/3 of the assembly.
Be careful not to solder the lugs to the bolt.




When cool, remove from bolt and mount in this position.
Use a shakeproof washer underneath.




Your work should look like this.




Cut an 18cm length of Green/Yellow wire.
Connect between the IEC earth and ground point.
Trim and connect the power transformer Earth wire as shown.




Nip and bend the legs of the NTC as shown.
(Your kit is supplied with a 47 ohm version)




Solder to the IEC socket as shown below.




Cut a 9cm length of blue wire.
Strip and solder as shown.




Now trim, strip and solder the power transformer wires as shown.
Once soldered insulate with liquid tape available from
electronics supply stores.




Use some cable ties to tidy up your work so far.




On the two output tube sockets, remove pin 6, then cut pins 1 & 8 to ~7mm long.




Bend pins 1 & 8 as shown, then solder together.




Bend pins 2 & 7 out slightly then attached white heater wires from power transformer as shown.
Strip bare 10mm then twist and wrap around pins.




Cut two 21cm lengths of white wire stripping bare 10mm each end.
 Connect from pins 7 to 7 and pins 2 to 2 on the output tube sockets.




Cut and connect the green 6SL7 heater wires as shown.
From power transformer to lower tag-strip.





Cut and connect the red HT wires as shown.
From power transformer to upper tag-strip.