Hi, paddy,
While I can't help with a picture, won't comparison with the left side help?. The main power feed would be a different colour, and the return wire, but the principle would be the same. A flipper unit has those similarities to any solenoid, but with additional switching, and (for 'conventional' high-current types) no direct electronic involvement in the return circuit
As a guide, tie-back diodes have their cathode (banded end) facing the power supply - it/they would conduct as almost a short circuit if facing the other way. I've always supposed that the band on the component symbolises the 'bar' of the schematic symbol, without the 'arrow' from the other end to show the direction the diode will conduct
If the coil is a series-wound type, where the junction between the two windings is on the central terminal, then the EoS switch should by-pass the thinner secondary/Hold winding when closed
If a parallel-wound coil is used, which I think may be the case if Operation Thunder has a capacitor added to the EoS switch, then the closed switch should complete the primary/Power circuit, so that opening it leaves the Hold winding to, err, hold
In Williams practice, anyway, a parallel coil has both windings begin at the supply end, with the primary ending at the centre tag and the secondary running right across to the far side
