Battery question, T-bar connector

Looking at a battery upgrade for my trolley,
the majority seem to have this T-bar fitting so i'll need to change the port in the trolley itself but struggling to find what i assume is a female socket :mad:

Any pointers as what to search for ? http://www.torberry.co.uk/superbasket/index.php

mucho gracias for any replies.

Torberry connectors can be changed to a male or female connection easily.:thup:
 
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