Reddit reviews Hosa HSS-010X2 Dual REAN 1/4" TRS Pro Stereo Interconnect Cable, 10 Feet
We found 1 Reddit comments about Hosa HSS-010X2 Dual REAN 1/4" TRS Pro Stereo Interconnect Cable, 10 Feet. Here are the top ones, ranked by their Reddit score.
Nickel-plated REAN plugs for efficient signal transfer and superior durability24 AWG Oxygen-Free Copper (OFC) Conductors for Enhanced signal clarity90% OFC Spiral shields for a higher signal to noise RatioConnectors: Dual REAN 1/4 in TRS to sameConductors: 24 AWG x 2 OFC
I couldn't find a clear picture of the back of a WK 3500, but it's outputs looks like two 1/4 inch cables with each being left and right.
You would get two 1/4 inch TS (tip sleeve, cheaper than TRS, tip ring sleeve) cables and they would probably go in the inputs on the M-audio labeled guitar line input, trying the MIC/LINE switch in both settings
http://www.amazon.com/Hosa-Cable-CPP202-Dual-Inch/dp/B000068O1B/ref=sr_1_1?s=musical-instruments&ie=UTF8&qid=1451745839&sr=1-1&keywords=1%2F4+ts+cable
One day you might find yourself needing TRS cable though, which will also work here.
http://www.amazon.com/Hosa-HSS-010X2-Dual-Cable-4-Inch/dp/B00FC4Z842/ref=sr_1_58?s=musical-instruments&ie=UTF8&qid=1451745885&sr=1-58&keywords=1%2F4+trs+cable