HI Batur,
The problem with your panel is it is missing the holes for the temperature Switch and MW50/AFN2 Switch. There are also "exta" holes in the main panel which are not on a normal Me109. Also, because the proporsions are off, (hole for the Magneto Switch, for example), it is almost impossible to tell what should be in that square hole. Looking at it, it seems like it is around the same size as a BG25...but for sure the BG25 would never have been moved to that position.
Chris' 2nd photo shows an FS16 Radio Frequency Switch eblow the Dual Pressure Guage...it is posisble it was designed to mount that...before they decided on the Packetschalter (round frequency swhich that sits in this position on mid-late me109's)
Mike