Just bought one of these
http://www.ebay.com.au/itm/291194029208?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1439.l2649
There are none of the confusing interlock wires just simple clean layout and very compact.
Terminals are labeled clearly in English. You just need to supply an enclosure and insulate the FETs from a heat sink.
It doesn't get much simpler than this.