IIRC there are 2 1/4" screws holding in the control assy.
Remove knobs then screws & the whole panel slides out.
BTW there is a tuner service mounting on the rear of the main chassis.
That blank metal arm near the power transformer is part of it.
Also has a place to nail down the control assy. Cant remember where
but IIRC it involved a U shaped bracket.
73 Zeno
LFOD !