rc controller external antenna's

[GravityRZ]

i currently use the rc controller with external HX-link antenna's
i am thinking of adding 1 Alfa M25 antenna for better long range signal

the left antenna does RX/TX
The right antenna does only RX

what would be the best setup
alfa left HX-link right (alfa for RX/TX)
or
alfa right HX-link left (alfa for RX only)