they had slotted mounts to fit the mountain lx brake levers. as far as i know that was the only way to use them (with the proper brake levers)
the levers were plastic, flexy & 'ok'
the shifters were slimmer than the deore/xt versions, flexed more in use, & the mounts were not as stiff. also 'ok'
mind you i loved mine, i had them on ridgeback, which was my first proper mtb
that was in 1989, the only year mountain lx existed. (i think..)
89' Ridgeback 602lx/603
91' Muddy Fox Alu Pro
87' Muddy Fox Courier
86' Muddy Fox Courier
85' Porsche 924!
On the Kona hunt ..