I think its a good idea to have a small access hole in the tank lid. (builditsolar.com)
• Fold - down front for writing • Internal space for documents • Spacious cupboard with adjustable shelf and access holes for cables • With hand - applied patina • Brass - effect fittings • Low maintenance lacquered finish (lauraashley.com)
Renner and Chomicki therefore assume that the change in the size of access holes with altitude represents an adaptive response to the change in the composition of prospective tenants. (sciencedaily.com)