  Majorana bound states (MBS) differ from the regular zero energy Andreev bound
states in their nonlocal properties, since two MBS form a single fermion. We
design strategies for detection of this nonlocality by using the phenomenon of
Coulomb-mediated Majorana coupling in a simplest setting which still retains
falsifiability. Focusing on the implementation of MBS based on the quantum spin
Hall effect, we also design a way to probe Majoranas without the need to open a
magnetic gap in the helical edge states. In the setup that we analyse, long
range MBS coupling manifests in the $h/e$ magnetic flux periodicity of
tunneling conductance and supercurrent. While $h/e$ is also the periodicity of
Aharonov-Bohm effect and persistent current, we show how to ensure its Majorana
origin by verifying that switching off the charging energy restores $h/2e$
periodicity conventional for superconducting systems.
