so is there not a lead i can get to connect the wheel controls thnx
The simple answer: No. I had a look at the manual for the KH 2377 (which I found after a quick search on the internet),
and there seems to be no input for wired remote on it.
A more complex elaboration on the matter:
The different car manufacturers, and head unit manufacturers all have different systems for wiring,
not just with regards to connectors and their pinouts, but also voltages, signaling, etc.
The most well-known head unit brand names do offer adaptors to fit a wide selection of car makes and models.
I'll use my own case as an example:
I started by looking at a range of well-known and reputable head unit manufacturers,
making a shortlist of the models from each make that met my needs as far as possible, and pitched these particular models against each other.
Among the needs I had selected as crucial to my decision, was indeed the ability to retain factory steering remote and external dash top display,
and the availability of an adaptor that let me do just that.