Amstrad CPC Edge Connector Expansion Port Male to Male Adaptor Boards (2 Pack)

[simulant]

These 50 pin small edge connector male-to-male adapter boards may be handy to some users.

https://www.simulant.uk/shop/Amstrad-CPC-Edge-Connector-Male-to-Male-Edge-to-Edge-straight-through-pcb
They let you join two female ribbon cables together or you have an expansion that already has a ribbon on with a 2nd female slot you can use them to then connect another expansion.