Meta-analysis with metacont (R) LSmeans + SDs or SEs ?

Hello forum,
As I am quit new in R and not such a pro in statistics, so sorry if my question is very naive.
I would like to do a meta-analysis with several studies for which I have the raw data. The research question was the same but the design of the studies was different. To take these differences into account, I performed a GLMM for each study to extract the LSmeans and SEs.
I then wanted to perform a meta-analysis with the meta package in R using the LSmeans and SEs. However, with the metacont function, it is the SDs that seem to be requested. Can I still use the SEs or should I transform the SEs into SDs?
Thanks in advance.