these are the directions i followed.. got em off some forum

i had to leave off a part to fit wallmount though
Here are the details on how I solved length issues with my ProMedia wires. As well as a NICE upgrade to 16 gauge wire.
Special thanks to cstegawski for most of this solution, seen here -
http://www.klipsch.com/ubb/Forum13/HTML/000603.html
All these products can be found at radioshack.
What you need.
Tools - wire cutters, GOOD electrical tape, two pairs of plyers.
Items to buy at radioshack
A. 16 gauge wire(I used 100 ft Speaker Wire 16 gauge, stranded, white) $16.00
B. Insulated-Crimp Pin Connectors, package of 10 red and blue, #64-3095 $1.50
C. Four 1/8" Solderless Mono Gold Plated Plug with Strain relief. #910-0762 $2.19/each
D. Pack of Insulated-Crimp Ring-Tongue Terminals #64-3117 pack of small ones, not assorted sizes need 8 total. $1.49
Now to get down to business.
Cut wire to length(add a few feet for good measure). Split wires(with shielding attached) from each other about 2" down.
Strip(take off shielding) both wires at one end, about 1/2" down.
Remove red and blue ends of ring tounge terminals. Best achieved by holding ring with on pair plyers and pulling opposite direction on red/blue shield with other pair.
Trim so wire fits and is covered by ring tounge terminals(about 1/8"

.
Twist exposed wire so all is neatly together.
Insert wire in ring terminal. Crimp ring terminal with plyers. Then flatten ring portion of terminal from the sides. So it is straight instead of round. Light pressure so you don't damage ring.
Take apart mono plug. Remove plastic casing inside plug. Remove strain relief (part that is like a spring) from end by turning bottom portion upside down and pushing it out. Once this is finished, place wires inside bottom portion of plug and pull through, making sure threads are facing striped ends of wire.
Remove screws from plug and attach ringed ends. Make sure you know which one is positive and neg. Positive on inside, neg on outside.
Wrap very small piece of electrical tape around inside post, so the post will not touch each other when compressed.
Then wrap slightly larger piece around outside of plug, below threads but covering posts. Use only enough to cover on time around.
Work bottom piece of plug up to threads, paying attention not to disturb the electrical tape (this is the hardest part).
Screw and you are done with that side.
For the subwoofer ends.
Seperate and strip as above but this time use the Pin Connectors. Blue on Neg Red on Positive. Leave the red and blue ends on these. Crimp and you are done.
This is a wonderful solution and with a couple tries EVERYONE will be able to get it done.