I’ve made some holes in the case so you don’t need to open it up to connect and disconnect the speaker leads.
You can see why it would be nice if HiFiBerry silk screened the hole locations onto the box . . .
Might not be a good idea for a steel case of some sort because of the risk of shorting the speakers to ground, if raspberry pi steel cases are earthed … ?
Actually how is the zynthian case earthed…?
And are we absolutely sure Left is left & Right is right …? 