Failed power seat switch - manual adjustment

[L4WL3SS]

Something thats bugged me about my wrecker sourced powered zr6 seats is the driver seat height adjustment has never worked.. 

Have narrowed it down to a faulty switch assembly which is near impossible to source without buying the whole seat. Using my own dpdt switch & running power straight to the motors only made it go up to max height & now i have a bigger problem haha. 

Surely theres a way to manually adjust it but after a quick inspection it looks pretty daunting. Any ideas? 

Edited February 8 by L4WL3SS

[L4WL3SS]

I couldn't see any way of manually adjusting height, so i tried the dpdt switches again, but this time instead of piggybacking into the circuit, i cut the motor plugs away from the factory loom....... And bingo, it all works, and i can adjust downwards without wires melting. 

Obviously a replacement seat switch is needed, but this will do in the meantime 

 Thanks to the following page i was able to understand how to wire the switches up to the reverse polarity motors.

https://www.vegoilguy.co.uk/reverse_polarity_switching.php

Edited February 8 by L4WL3SS