I have an install on my boat with 2 x 12V 300Ah NG batteries and a Lynx NG BMS and distributor on the BMS outlet. Like you I did not have room for the Class T power in. I purchased 2 BEP Class T Fuse holders and some BEP Pro Installer Links. I had to mount 1 of the fuse holders about 5mm higher and connected them to the BMS positive lug. This is working well. Attached is a photo of the set up on the work bench before installation. You can not see the BEP links as I have a 3D printed cover. I am sure it would be OK to connect the Class T fuses to the BMS lug with cables. Both negative cables connect to the negative lug. There is also a sketch which you should be able to follow showing the 2 links between the BMS and class T fuse holders.