Which male connectors?
 

Hi, I need connectors to wire up a set of lipo saddle packs, I presume I need male corally connectors? are they a universal size?

yes, 4mm banana plug. pretty much all model shops will stock them. Just ask for male corallys.
Or have a look on ebay.

Fastrax 4mm's are pretty good, they have a right angled hole which is useful to keep things neat and tidy.

Second what Ry says about the right angle connectors, especially useful when the bodyshell doesn't offer much clearance over the connectors