Clevedonroger

Hi all, New to Yamahas and the site! I've bought a 1997 North American Virago (I'm in the UK). The bike was advertised as needing a new CDI (by the dealer). I asked if the original unit was on the bike and was told it was. Bike turns up and it's not the original. I've sourced what I believe is the correct unit (J4T033). The original white connector block is on the 6 spade connection but on the four spade side the block is missing and there are three terminals/wires connected directly to the spades. The three wires are blue/red, black and grey. Question is do the wires connect to the corresponding terminals on the J4T033 unit (cost a small fortune so don't want to fry it). Any assistance would be appreciated. Thanks. Roger