Cut, labeled, and attached Wirefy heat shrink spade connectors. Power from ECB to power conditioner, and from power conditioner to six port fuse box. Fuse box to EFIS power. Wired ribbon cable connection switching EBC1 circuit to power conditioner. Grounding the ribbon cable energizes EBC1.
Power conditioner holds a charge after de-energizing the EFIS circuit, which prevents an instantaneous reactivation after switching ECB1.