Making a 4-pin Suitcase cable

[sajohnson]

Hello all,

My cable (4-pin) recently crapped out on me and I know there's a better way to replace it without forfeiting $70 in the process.
I'm no expert but I can solder, and I figure that's probably all the skill one needs for this project.
 
Any help with what cabling to buy? Will use the connectors from the old one but anything else I should know/have for this?