VTU's 054' radial is strictly a transition to intercept the localizer. Also note the "NoPT" for that transition, as with the same if you came off of FIM.

You can also use LAX or VNY as transitions, but both conditions you must do the procedure turn.

The way it is drawn, at least to me, is that SILEX can only be identified by the cross-radial off of LAX, notice that the line goes through the course, where-as the line from VNY does not.(Compare this to the VTU and FIM transitions, FIM goes through, VTU does not) I'm not 100% on this, but for the simplest description, I'd stick with it, the angle also from VNY is 30 degree's in relation to the LOC, could leave a lot of room for error in my mind also.

Anyone else notice the MAP? That's one very complicated and detailed missed!!! I could see that getting a lot of people in trouble