After I had bought an indivision aga mk3, I needed another output for hdmi. The solution was to use these small microhdmi connectors that I bought on ebay that are used with these nice flat cables.

I modified the back trap door with slots for 2xMicroHDMI and RJ45 network.

Also made an opening for pulling a microsd extension out of the computer (Micro SD Memory Card Slot to TF Card Extender Cable Extension)

The Micro HDMI connector socket is designed to hold the Micro HDMI Type D Female FPC Connector Socket with a flat cable. Search ebay for "Micro HDMI Type D Female FPC Connector". https://www.ebay.com/sch/i.html?_from=R40&_trksid=p2047675.m570.l1313&_nkw=Micro+HDMI+Type+D+Female+FPC+Connector&_sacat=0

You will also need two flat cables (FPC Flat HDMI Ribbon Cable) and two HDMI Type A male connector socket (HDMI Type A Female to FPC Connector Socket).

Recommended hdmi cable lenght is 20 cm.

Here is a package with hdmi female, male and cable: https://www.ebay.com/itm/Type-A-Male-FPC-to-CYFPV-Straight-HDMI-Female-Flat-Cable-for-HDTV-Multicopter/382598636360?ssPageName=STRK%3AMEBIDX%3AIT&var=651361237516&_trksid=p2057872.m2749.l2649

I have this as my microsd extender: https://www.ebay.com/itm/New-48cm-Micro-SD-Memory-Card-Slot-to-TF-Card-Extender-Cable-Extension-Linker/143350835120?fbclid=IwAR3ik9w-hqSHLvk9HdtTMhty98aT_yfATWckWzpXFcRqFBSjsINgOFL8SzE

I use two of this microhdmi to hdmi cable: https://www.ebay.com/itm/150cm-Micro-HDMI-Male-to-Standard-Male-Cable-Lead-Full-1080p-Tesco-HUDL-1-2-EU/162120162262?ssPageName=STRK%3AMEBIDX%3AIT&_trksid=p2057872.m2749.l2648

Get some flat ribbon cable for the network module, and remove the top on one end or else it will be touching the floppy drive. See pictures for description. https://www.ebay.com/itm/10pcs-10pin-2-54mm-IDC-Flat-Ribbon-Cable-Wire-for-Atmel-AVR-ISP-JTAG-DownNWUSHH/303636924114?hash=item46b22bc6d2:g:DEwAAOSwfLxbEfQf

Screws: One M2x10mm for the ENC28J60 Ethernet Module LAN

The microhdmi sockets should snap into place,but you can use a drop of superglue or a glue gun to hold it extra firmly in place.

I use it on my Amiga 1200 with a Vampire 1200 accelerator and an Indivision AGA MK 3.

Use it together with my other designs to hold the sd card extender: https://www.thingiverse.com/thing:4563129

or https://www.thingiverse.com/thing:4578398