Damned bulkhead connectors.

I used one of these

http://www.diyautotune.com/catalog/weather-pack-22-position-bulkhead-connector-kit-p-364.html

takes weather pack connectors and seals,, works great

here is another option,,

http://www.eficonnection.com/eficonnection/ConnectorDetails.aspx?ItemId=761

this one has 6 fairly large capacity ports