That'll be an M-Max I suspect. I have one of those in the drawer if anyone wants to buy it...

This is how I fitted the HRC unit to mine:



I removed the pins on the HRC loom, and fitted pins which matched the NSR sockets. Then, put masking tape round the plug and filled it with silicone sealant. Good enough for aircraft (granted, battle damage repair only!)
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MC21SP Plaything
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