How do I wire in series speakers in different box

i just built 4 186 folded horn cabs..and I have them loaded with an 4ohms tit drivers...I need to wire two sub's each in series to have an 8ohms load pair per side and bring them back in parallel to have all 4 cabs @4 ohms load..I plan to use only use one amp rated @ 5000watts bridge mono 4@ 4ohms...I would easily do these internally if two drivers are in a single cab ..but now they are all 4 separate cabs..how can I achieve the series wiring externally using only neutric speak on connectors and wire without flooding the back of my cabs with flying wires? Any fast ideas please?

Put the amp in parallel or stereo and just put two 4 ohm cabs linked in parallel on each channel.  An amp that does 5000 watts bridge at 4 ohms should do 2500 per channel at 2 ohms instead.  A 4 ohm load on a bridged amp presents pretty much the same load as two 2 ohm loads on a stereo amp.