The Load Save switch was a solution to excessive wear and tear on the tape connector on cassette players.
Because the Coupé had a single tape socket (unlike the ZX Spectrum’s MIC and EAR) when saving a program to tape you had to swap the lead from the EAR to the MIC connector on the tape player.
The Load/Save Switch was a box with two flyleads going to the MIC and EAR on the tape player and a switch to allow you to select either and this save wear on the tape player sockets.
