Direction of Installation of an Assist Receiver

I did install a REX 9 Slim Assist into a Pike Precision F3G.

The place is very tight, and the canopy is upside-down.
Therefore I installed the receiver upside down, to make room for the antennas, and position all the cables.

Thereafter, I found out that the Assists do not accept the installation upside-down with antennas looking to the front.
Unfortunately the model does not accept antennas looking backwards.

I wish, Jeti could add the "upside-down/antennas forward" option to the installation position which can be selected.