That is where you need to use a few tools to make the job look even better. I like to use a pair of pliers that are called Diagonal Cutters, as you can see they have been part of my modding tool box for a long time now. If you do not have a pair you can always go to the hardware store and grab some for just a few dollars and that way you can start to build up your toolbox for your modding. In place of the pliers you can use just about anything that will cut the plastic, such as a pair of scissors or a razor knife; which I will use in just a few moments.
So take your cutters and place the cutting edge as close as possible to the locking part of the wire tie and cut the plastic off.
There it is all gone, but hey there is a little nub sticking out. Unless you have a zero edge diagonal pliers you will have this and well you have a choice. You can either leave it or remove it. Me, I remove them for two reasons; one is for purely for the looks and the other is that the left-over piece that sticks out can have a sharp edge to it and it can cut you when reaching into the case to do something. This was learned from experience and it only took once, OK twice, but I did learn from it.
This is where the razor knife comes into play as you can either skip the pliers all together, I don’t recommend that technique, and trim the piece flush to the locking device. The reason I do not recommend doing it this way is that the plastic can be rather hard to cut and you may need to place it on a hard surface to get the backing you need to cut it off; so if you try this you may run the risk of putting a nick or even cutting a wire in the process.
With just the nub sticking up you can slowly and safely push the razor on the edge of the lock and trim off the piece with little effort. As you can see once the nub is trimmed off it does make it look so much better and safer.