How to determine test point for MTK bootrom?

Hi, I need to find test point for bootrom on Huawei MediaPad T3 7 (BG2-W09). The tablet is bricked with mmcblk0boot0 and mmcblk0boot1 having been corrupted or wiped out. TWRP is present on device in both recovery and erecovery partitions. I just can't get to them and can't find authentication file for flashing with SP Flash Tool. I need to try to find test point to short into bootrom or a solution to flash preloader and boot that works around secure boot policy. I really would appreciate any help I can get as this is beginning to get the best of me. I am trying to attach photos of board(2nd attempt). Thanks