I have a router model ZTE F660 according to the paper at the back of the router, from the interface after login in the router it looks like a ZTE F609 more. However what i need it has to do with motherboard of the router. This ZTE model has internal antenna for Wifi. I want to replace internal antenna (because Wifi range isn't enough) with an external antenna. I have already some omni directional antennas 5 Dbi and 7 Dbi. But after I opened the router I can't find where is or are these internal antenna or antennas, and where is made the connection with the motherboard. I have already all the external antennas, cables and other stuffs to replace the internal antenna. I can provide even photos of the motherboard. If somebody can show where should I sold the cable to install external antenna?