best way to lube clutch cable?

i need to lube my clutch cable,the clutch is very stiff and im thinking this will help/fix the problem..whats the best?heard of using motor,but lithium grease would be better but harder to get all the way thru cable..any suggesttions or tips on how and want to do?thanks scott

I bought an adapter that clamps over the cable at the end of the cable housing that seals the end. (Not sure if that makes sense without seeing it.) You can inject grease into the cable housing, with the cable still in there with a regular grease gun. I got this one at Princess Auto here in Canada, which is a store a lot like Harbour Freight in the States, so I'm thinking they may have the same thing available. Here's a picture so you can see what I'm referring to.