Windows 7: need little help

Gigabyte Radeon HD 4650 Video Card - 1GB DDR2 i have 2 and they came without conector for the brigde for crossfire can i just install it withou the bridge, my mobo is CROSSFIRE READY MSI K9A2 PLATINUM AM2+AM2 AMD 790FX WITH PHENOM QUAD CORE PROCESOR. is this cards plug and play abd my mobo will detected crossfire or do i need get another whit the conector to conect the bridge, please any help

Your motherboard should have come with two Crossfire bridges. If it didn't, the good news is, they're only a few dollars on Newegg.com

You'll need to make sure the card is Crossfire supported. There are two version of the Gigabyte card, one that supports Crossfire and one that doesn't.