To hover over a link you need these steps: 

1. Route PCCursor to VirtualCursor (Ctrl.+JAWS+Delete)

2. Active JAWS Cursor (NumpadMinus)
3. Route JAWSCursor to PCCursor (JAWS+NumpadMinus)

You need these 3 steps because as far as I know there's no script to route the JAWS-Cursor (= Mouse) to the VirtualCursor. 

If you want you can use the following script to do these steps in one and add your own shortcut: 

<Code start>

Script RoutMouseToVirtual ()
; Save which Cursor is used 
SaveCursor ()
; Route PC Cursor to virtual Cursor 
RoutePCToVirtual ()
; Wait till the commands are over 
Pause ()
; activate JAWS Cursor
JAWSCursor ()
; wait again 
Pause ()
; Route JAWS Cursor to PC Cursor 
RouteJAWSToPC ()
; wait again 
Pause ()
; Get back to the cursor you used at the begin
RestoreCursor ()
EndScript 

<Code end>

Sometimes you need to route the JAWS Cursor (mouse) to the element with focus and make a mouse click there. So here is another script to do this task. Added is one more line to do the mouse click: 

Script RoutMouseToVirtual ()
; Save which Cursor is used 
SaveCursor ()
; Route PC Cursor to virtual Cursor 
RoutePCToVirtual ()
; Wait till the commands are over 
Pause ()
; activate JAWS Cursor
JAWSCursor ()
; wait again 
Pause ()
; Route JAWS Cursor to PC Cursor 
RouteJAWSToPC ()
; wait again 
Pause ()

; do a left mouse click 
LeftMouseButton ()
; Get back to the cursor you used at the begin
RestoreCursor ()
EndScript 

<Code end>

I hope this will help you. If you need more instructions on installing the script(s) let me know. 

All the best

Udo