In an old (1974) V20 Steplift, the bilge is also the best place for two batteries, with room for a bilge pump between them.  The batteries are strapped down with belts.  The security cable will loop over both batteries through eyes installed in the deck beside the battery/bilge well.  The cable will prevent someone just twisting the eyes out, of course.   
 
The cable is coated with plastic and I will coat the ends in heavy grease periodically, since this is NOT stainless steel.  But the cost is also not prohibitive. 
 
Larry
		 
		
		
		
		
		
		
			
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				1975 Wellcraft V20 Steplift with 1979 Evinrude 150.  Newly rebuilt dual axle trailer.   Boat is in a slip behind Harbor Island on San Diego Harbor.
			 
		
		
		
		
		
	
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