I have been told that it woudnt be safe?!
		
		
	 
They would if it wear stronger design. 
 
have a read here never mind what youve heard.
 
You need to mount them to somehting strong but regardless you need to mount them higher and better. Have a read here
 
Where harnesses should be located.
http://www.cliosport.net/forum/showthread.php?t=224554
 
	
		
	
	
		
		
			my car passed its MOT with the harness's wrapped round the strutbrace...its safe 
 
		 
Mot doens't check for its correct construction only that there not fraid.
 
Put it this way it CANNOT have been made by Renault and passed Uk safety checked and been sold with mount where they are now it woulnd't pass FIA approval either for entry into a race series..