Mount with 3.5x20mm hexagon screws
I used this rocker button: https://www.amazon.de/Toggle-Switch-2-Pole-Insulation-mmtrade/dp/B07P769WDV/ref=pd_lpo_60_t_1/257-2487769-3799663?_encoding=UTF8&pd_rd_i=B07P769WDV&pd_rd_r=d7f4d8f2-c269-4bbd-bdb1-acfec94f051e&pd_rd_w=ZBY5O&pd_rd_wg=K5JUJ&pf_rd_p=d5c9797d-0238-4119-b220-af4cc3420918&pf_rd_r=JXRVRTQR4V0ZS9WHWGYX&psc=1&refRID=JXRVRTQR4V0ZS9WHWGYX
No support needed
The author hasn't provided the model origin yet.