The L+ and L- wires which go to the tube are essentially a loop antenna. The larger the area between those two wires, the better this loop antenna will work.
Of course we do not want this antenna to be any good. We want to keep the noise to a minimum.
So, keep those two wires close together and try to keep some distance to other wires where possible.
It should work fine if you reroute the wires a bit.