Wiring a garage door opener to a switch blank

[brancky3]

I'm trying to wire my Liftmaster remote to a switch I bought for one of the cupholder blanks... I soldered wires to the opener pins and connected them to the switch, it works great before I clip everything down (transmitter is still in my hands) but it doesn't work once installed and the transmitter is tucked under the center console. Obviously it's a range issue; however, I can't find anywhere to put the transmitter that will allow it to still reach the opener. Mind you, I'm sitting in my garage literally 5 feet away from the antenna wire.

Where have you put your transmitter? Maybe I need to invest in a higher quality opener?