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
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