What you need
Rean Neutrik NYS228G 1/4th connector.
The pin layout:
1 = L+
2 = L-
3 = R+
4 = R-
There is a notch at the top of the SN-8-4(P) connector that you can use as a reference. Each pin is numbered but it is incredibly difficult to see the number when soldering.
1 = L+ used for left audio channel
3 = R+used for right audio channel
2 = L- ground
4 = R- ground
You should strip the Canare cable about 3/4th of an inch. Twist each strand tight, going with the natural bias of the wire, and then tin each strand. Measure each strand against the e-valucon plug and trim the strands down appropriately before soldering. It doesn't take alot of solder to make a solid connection to the e-valucon SN-8-4 plug. Patience and a steady hand is key.
Soldering the TRS adapter is much easier. Twist the L- & R- cable together and tin them with solder to form a common ground. Then solder the common ground, left and right audio channels to the appropriate connections.